五年级上册小数乘法测试500题及答案
人教版五年级数学上册专项训练---第一单元小数乘法口算题(含答案)
第一单元小数乘法口算题(提高)注意事项:1.答题前填写好自己的姓名、班级、考号等信息。
2.请将答案正确填写在答题卡上。
3.答完试卷后,务必再次检查哦!一、口算1.口算。
1.2×0.6=2.5×16= 1.1×0.5= 1.45×20=1.6×4=3×3.03=0.42×3=0.15×400=2.口算。
0.5×0.5=0.6×0.14= 3.5×0.2=0.6×0.15=0.25×0.4=0.125×0.8= 1.2×0.5=0.25×0.8=3.02×0.2=0.25×3= 2.5×0.4=8×0.15=1.3×0.3= 1.2×0.8=0.02×0.5=10.4×0.3=3.直接写出得数。
2.5×4=9.5+0.95=0.15×8=0.4×0.4=50×2.4= 1.2+4.5=0.1-0.01=100×0.7=0.9-0.52=10.1×8.99≈12.5×0.8=0.22×4=100-35.33= 2.5×3.5×0.4=4.直接写出得数.4.2×0.1=5.6×100=32.5+12= 2.3×4×0=20.6–0.6= 2.5×0.4=1–0.17= 2.1+0.8=5.口算。
0.5×3= 2.5×4= 1.25×0.8=1.6×0.8=0.12×0.03= 1.4×0.6=6.口算。
0.6×0.6=0.07×0.9=0.4×0.8=0.15×0=0.16×0.5= 1.25×8=0.25×200= 2.5×20=1.02×6=0.45×0.2=0.6×1.5=0.8×1.5=7.口算下列各题.0.5×80=0÷0.73= 2.5×4=0.8×125=5.3×99+5.3 = 0.49÷4.9= 3.12÷0.01= 0.56÷0.7=8.直接写得数。
五年级上册小学数学人教版第一单元小数乘法测试题(有答案解析)
五年级上册小学数学人教版第一单元小数乘法测试题(有答案解析)一、选择题1.乐乐冲洗15张照片,每张照片的冲洗费是0.85元,乐乐笔算如下,箭头所指的“85”表示()。
A. 冲洗1张照片的钱B. 冲洗5张照片的钱C. 冲洗10张照片的钱D. 冲洗15张照片的钱2.下面算式中乘积最大的是()A. 9.999×6.999B. 99.99×69.99C. 99.99×699.93.计算(8.9+8.9+8.9+8.9)×2.5时,()最简便。
A. (4×8.9)×2.5B. (8.9×2.5)×4C. 8.9×(4×2.5)4.如果0.98×A<0.98,则A与1的大小关系是()。
A. A>1B. A<1C. A=1D. 不能确定5.的积是()位小数。
A. 20B. 21C. 22D. 23 6.1.01×25=()A. 2.525B. 25.25C. 252.57.下列各式中,积最小的是()。
A. 0.5×1B. 0.5×0.5C. 0.5×1.58.两个因数相乘,积有四位小数,已知一个因数是3.9,另一个因数()是3.615。
A. 可能 B. 一定 C. 不可能9.1公顷的阔叶林在生长季节每天可释放出0.73t氧气。
某森林公园中有一块面积为20.5公顷的阔叶林,这块阔叶林在生长季节30天可以释放出()t氧气。
A. 448.95B. 484.95C. 61510.计算0.35×0.4×0.5时,用简便算法应先算()。
A. 0.35×0.4B. 0.35×0.5C. 0.4×0.511.下列各式中,积大于第一个因数的算式是()。
A. 85×0.95B. 0.01×1.01C. 9.6×0.1112.在下列算式中,结果与5.6×4的积不同的是()。
五年级上册数学试题-第一单元 小数乘法 测试卷-人教版(含答案)
五年级上册数学试题-第一单元小数乘法测试卷-人教版(含答案)一.选择题(共6题,共12分)1.要使4.5×□+5.5×□=4.06,□中应填()。
A.4.06B.0.406C.40.62.6.8×0.46的积保留两位小数是()。
A.3.13B.3.12C.3.128D.3.13.a÷0.5=b×0.8=c×0.9=d×1(a、b、c、d均不等于0),则a、b、d中最大的是()。
A.aB.bC.cD.d4.80.8×49的积最接近()。
A.400B.390C.4000D.25005.若甲×0.95=乙÷0.95(甲、乙均不等于0),则()。
A.甲<乙B.甲>乙C.甲=乙6.下列各式中,计算结果大于1的算式是()。
A.1÷1.001B.1÷0.8C.0.98×0.98二.判断题(共6题,共12分)1.求商的近似数和求积的近似数一样,必须求出准确数。
()2.一个非零数的1.2倍一定大于这个数。
()3.在小数乘法中,两个因数的积一定大于这两个因数。
()4.7.6乘一个小数,积一定小于7.6。
()5.两个小数相乘,积小于其中任何一个因数。
()6.11×1.3-1.3=11×0=0。
()三.填空题(共6题,共24分)1.在3.3337.8484…、5.90909、3.1415926中,有()个循环小数,有()个无限小数,有()个有限小数。
2.3.14加5.6与1.2的积,和是多少?列式是()。
3.在括号里填上合适的数。
(1)0.35×0.75+0.65×0.75=( + )×(2)1.25×(0.7×0.8)= ×(×)4.6.080、6.0800、6.08这三个数中,()的精确度最高。
5.一个因数是4.67,另一个因数是2.3,它们的积是(),保留两位小数约是()。
小数乘法口算500道+竖式300道(含答案)
小数乘法口算500道+竖式300道(含答案)小数乘法口算500道+竖式300道第一部分口算500道一.计算题(共50小题)1.直接写得数.0.5×1.4=80×0.125= 2.5×0.4=0.036×100=0.24×5=0.12×0.5=35÷1000= 2.2×0.5=0.12×5=0.04×0.1= 3.5+0.15=8﹣6.9=2.口算.0.4×5 1.2×44×1.51×0.50.01×0.1 1.25×0.40.36×0.20.8×03.直接写出得数.0.12×6= 1.25×0.4=30×0.8=12.5×0.8= 3.73﹣0.8﹣1.73= 3.26×0= 3.25+0.74= 5.2﹣2.64=0.24×5=4×0.05×2=3.9+7.1= 6.2×0.5=0.25×0.4=0.036×100= 3.64+6.36+5.5= 4.直接写出得数.0.4×0.02= 1.8×0.4=6×0.25= 1.25×0.8=3﹣0.98=0.9÷0.01= 3.9×0.01=99×0.25= 5.直接写得数:0.5×3=0.45+0.4=4×0.25=10.2+11.3= 0.09×100=8.7﹣0.5=0.96﹣0.7=12.9﹣2.9= 3.69×0=38.7÷10=6.直接写得数:0.2×3=0.45+0.4=4×0.25=18.7+11.3=0.09×100=8.7﹣0.5=0.96﹣0.7=18﹣1.67=1×8.79= 3.69×0=38.7÷10=2÷100=7.直接写出得数.0.28×10=0.9×5=8×0.06=0.05×1.6= 100×0.7= 2.5×8=1.06×7=12.5×0= 1.7+3.3×0.2=0.2×0.2×0.2=8.直接写得数:0.2×36=0.45×2=4×0.25= 3.8÷100=0.09×1000=1﹣0.9=0.96﹣0.7= 2.5×7.4×4= 9.口算0.2×0.4=8.2+1.8= 6.45×0.01= 2.5×0.4=0.8×50= 2.4×5=0.9﹣0.52=10.2×4.5= 10.直接写出得数.0.7×0.9=0.14×0.3= 1.7×0.03=0.12×6=5.5×10= 2.6×0.5= 1.8×0.04= 2.6×2﹣0.5= 11.直接写出得数.5×1.8=0.8×1.5=0.65+0.35=9.8+1.2=0.25×4=1﹣0.63=10.75﹣0.5= 1.25×80=1.7×0.9= 4.6×0.5= 1.42×100=19.8﹣8= 12.直接写出得数.0.25×4= 1.25×8=8.2×6.9×0=0.2×18=6.29×100=0.02×500= 3.4×2=0.26×0.5= 13.直接写得数0.2×4=0.8×25=0.57+0.43= 2.8×10=18.4÷100= 2.5×0.4= 4.7﹣1.78=0.125×8=1.8×0.5=0.035×1000=14.口算0.4×20= 1.3×3=0.25×50=0.9×300 2.4×50=0.125×200=600×0.4=800×0.25=1500×0.2=15.列竖式计算.2.3×0.8= 6.9×3.1=9.87×1.8=24.5×6.820.6×4.5=10.2×5.01=16.直接写得数.3.14×7=52=6π=62﹣20=402﹣302=b×b= 3.14×302= 3.14×42= 1.25×32=b+b=17.直接写得数.0.16×5= 4.2×0.3=25×0.4=2×0.45=0.5×0.07=0.3×0.7×10=18.口算题.0.1×208= 2.8×2=3×0.18=0.2×600= 1.3×5=8×0.05=1.3×50= 80×0.05=7.26×1=0.4×22=0.15×40=0.7×1.4=1.25×10=4.5×0.02=0.03×8=0×1.001=0.8×12.5=0.4×0.7= 1.3×4= 1.35×10=1.4×0.4=1.4×5= 1.45×100=3.5×40=0.02×38=25×0.4=1.6×1.5=0.01×10= 250×0.04=1.5×0.02=0.05×12=200×0.05=2.5×0.4=0.05×430=20×0.5= 250×0.4=7.682×0=2×0.005= 2.05×2=19.直接写出得数.1.5×0.2= 1.25×0.8= 4.5×0.4=2.5×7×0.4=0.3×0.3=0.35+0.75=0.48+1.62=10.1×78=20.直接写出得数.0.2×8= 6.2+0.04= 2.5×0.4=0.6×0.7=18.5+71.5= 6.4+4.6=0.04×0.3= 2.1﹣2.01= 1.41×1000=21.直接写出得数45+426=58.7﹣38.5= 2.25×8= 2.7×0.8= 6.4×0.8=320×0.03=11.004×50= 4.8×9.8= 22.口算.2.4×0.3=0.25×4=0.06×0.8=8.5×0.2= 1.25×0.8=7.5×0.5=6×4.4=0.13×0.05=19×0.7=23.口算:0.9×0.3= 3.5×0.2= 2.1×0= 6.6×10=0.3×7= 0.27×3=3×9.6=0.8×1.5=7.2×0.6= 2.5×0.4= 24.口算0.37×10=0.37×100=0.37×1000= 2.5×4= 0.25×4= 4.8×2=0.12×0.3=2×5.8= 0.28×3=0.16×4= 3.5×2=5×1.2= 5×1.5=3×0.25= 3.5×0.2= 3.5×5= 5×0.25=0.3×0.2= 3.5×0.5=3×1.5= 25.直接写得数.0.5×6=0.125×8= 2.5×0.4= 3.1×0.3=4×0.25= 1.25×6=0.2×0.05=0.8×0.05= 1.7×0.3=1.25×200=40×0.05=0.04×2=26.口算.0.2×50= 2.4×0.5=0.25×4= 3.2×0.3=12.5×80=0.17×10= 4.5+3.85= 2.5×0.7×0.4=3.5×8= 1.2×0.6= 5.2﹣2.8= 3.7+5.8=27.直接写得数.0.5×0.7= 2.1×0.4= 3.4×0.2=0.06×1.2=0.63×2=0.05×0.06=0.8×0.4=7.85×0.01= 0.15×0.4=1.3×30=0.25×0.6= 3.125×100= 28.直接写出得数.12.5×8= 2.5×0.4= 6.4+4.6=0.04×0.3=0.5×2.4=0.2×2.5= 5.18+3.02= 1.41×1000=29.口算:0.3×4= 2.3×0.2= 3.6+6.4=0.6×0.7=1.6×0.4=0.9×0.08=0.25×4=12.5×8= 0.7×0.9=0.04×0.2=0.8×0.05=3.1×0.3= 0.16×0.5= 1.7×0.03= 1.8×0.04=0.12×6= 30.直接写得数0.8×25=0×4.23=0.57+0.43=0.02×500=12.5×8=50×0.04=80×0.3= 1.1×9=31.直接写得数.0.7×10 3.02×100 3.6×2 4×1.52.5×4 12.5×0.8 4.5+2.6 7﹣1.66.4﹣2.3 10+6.01 8.3﹣1.37.3+2.7 32.口算9.5×0.2= 3.2×0.5=0.8×2.5= 4.4×0.4=35×0.4=33.口算.0.8×7=0.9×0.3= 1.32×8=10.3×2=3.5×0.2=10×0.05=0.13×7=0.05×4=30×0.1=12.5×8= 3.25×0=0.4×50= 34.直接写出得数:2.5×4= 2.4×0.5=8×0.125=0.27×3=7﹣6.38=0.22×0.5=35.直接写出得数.(后两题得数保留一位小数)0.7×0.9=0.14×0.3= 1.7×0.03= 1.8×0.04≈0.12×6= 5.5×10= 2.6×0.5= 2.6×0.08≈36.直接写出得数0.45×0.2= 4.38+3.5=0.9×7=(3.85+5.45)×0=0.75×1= 2.5×4= 5.4×20=7.5×0.4=37.口算.2.3×2=10×0.2= 1.45×10= 4.3×10═ 2.4×5=4.5×0.9= 2.5×8= 3.9×3=5×0.01=5.98×1000= 38.直接写得数:2.5×33.06×20.25×44.2×105.3×100 2.5×62.2×4 1.6×4 1.25×839.口算.1.5×8=2.4×5= 1.25×8=3.58×2=0.5×0.9=40.直接写得数0.7×0.9=0.12×50=60×0.5= 1.8×0.04=1.25×8=24×0.05=0.15×0.4=0.9×1.5=3.4×0.7=0.78×0.2=30×0.5=0.8×0.9=41.口算.0.5×0.2=50×0.2=500×0.2= 2.4×4= 2.5×0.4= 0.25×40=0.125×8=12.5×8= 1.25×80=0.24×5= 42.口算:0.5×2=0.25×4=12.5×8=0.125×8=7÷0.7=1﹣0.125×8= 1.25×32=0.25×56=43.直接写出得数.0.4×0.3= 2.5×0.6=8.8×0.1= 1.3×0.2=5.28+1.6=10﹣1.7﹣2.3=6.09×0=100×0.7=44.直接写出得数0.5×0.2=0.25×0.4= 1.25×8=0×1000+3=0.5÷100=0.12×40=100×0.78=12.78+0.22=0.6+0+0.7=0.72+1000=45.直接写得数.0.5×0.2=4×0.15=50×0.4=8×0.125=0.23×10=0.12×7=46.直接写出得数.0.7×0.9= 2.6×0.5=0.14×0.3= 5.5×10=1.7×0.03= 1.8×0.04=0.12×6= 4.8×5= 47.口算0.2×0.4=8.2+1.8=100﹣35.22= 2.5×0.4=0.8×50=8×0.24= 3.9×1.3= 2.4×5=0.9﹣0.52=0×3.52=12.5×8= 2.4×0.01= 48.直接写得数0.8×0.6= 5.5×3=0.5×0.6=0.125×0.8=9.6×0.1= 0.07×0.9=12.4×0.2= 2.4×5=14×0.01= 1.5×2= 49.口算.0.37×100=0.25×4=0.3×0.2=70×0.12=18×0.3=0.5×0.6= 3.7×0.2=5×1.2=第二部分竖式300道一.计算题(共50小题)1.列竖式计算.75﹣8.49= 3.72×1.25= 5.04×26=5.94+12.7=0.95×6.7=35.62﹣13.4=2.竖式计算0.64×18=25.8×102=40.7×0.25=13.45×2.6=(保留整数)4.865×8≈(保留整数)10.23×42≈(保留一位小数)3.竖式计算(前面有*要验算).2.18×3.6*4.23×0.8620.07×1.0250.6×0.90.57×0.86*0.8×0.314.用竖式计算.8×0.12=(验算)1.9×3.5=(验算)0.401×0.3= 0.45×0.96=0.17×0.71=5.竖式计算4.57×1.8 0.125×0.8 3.75×0.249.37×8.52.07×3.6 3.35×1.6.6.列竖式计算:1.8×0.36=35.37+28.63=19.9﹣8.75=1.06×0.48=18.9+28.65=22.87﹣18.65=7.竖式计算7.6×0.82= 3.25×0.31=7.5×0.59=(验算)8.列竖式计算,带*号的要验算.25.78+3.12=13.8×9=*8﹣2.67=*5.73+6.7= 9.列竖式计算4.8×17 1.88×25 2.4×0.370.89×5.3.。
【人教新课标】五年级数学上册试题-小数乘法(含答案)
0.85×53.5=45.475(千克)
答:53.5千克小麦可磨面粉45.475千克。
解析、
小数乘法可以先转化成整数乘法算出积,然后看两个乘数共有几位小数,就从积的右边起数出几位,点上小数点。
4、每箱苹果重8.8千克,每箱梨的重量是每箱苹果的2.5倍,每箱梨多少千克?
答案、
8.8×2.5=22(千克)
2、不计算,在( )里填上>、<或=。
132×4.6( )132
答案、
>
解析、
一个数乘一个比1大的数,积大于原数。
3、不计算,在( )里填上>、<或=。
168×1.5( )168
答案、
>
解析、
一个数乘一个比1大的数,积大于原数。
4、不计算,在( )里填上>、<或=。
95×0.9( )95
答案、
<
解析、
一个数乘一个比1小的数,积小于原数。
5、不计算,在( )里填上>、<或=。
198×0.8( )198
答案、
<
解析、一个数乘一个比1小的数,积小于原数。
6、13.65扩大( )倍是1365。
答案、100
解析、
13.65的小数点向右移动了100倍,原数扩大100倍。
7、把3.67扩大10倍是( ),扩大100倍是( ),扩大1000倍是( )。
四、应用题(注释)
1、蒙古牛一般体重约320千克,草原红牛体重约是蒙古牛体重的1.32倍,草原红牛的体重约是多少千克?(得数保留整数)
答案、
320×1.32≈422(千克)
答:草原红牛的体重约是422千克。
解析、
小数乘法练习题及答案
小数乘法练习题及答案篇一:小数乘法简便运算练习题小数乘法简便运算练习题一、简便运算0.25×8.5×4 12.5×0.96×0.80.25×0.73×4 4.36×12.5×80.25×16.2×4 1.25×2.5×32 3.2×0.25×12.5 0.25×36二、简便运算(1.25-0.125)×8 4.80.32×403三、简便运算3.72×3.5+6.28×3.515.656.5×99+56.5 7.094.2×99+4.227.5×10.1 3.6×102 0.39×199 3.65×10.10.85×9.9 ×2.1-15.6×1.13.83×4.56+3.83×5.44 ×10.8-0.8×7.09 9.7×99+9.7 ×3.7-7.5×3.7 3.9×2.7+3.9×7.3四、简便运算2.3×16+2.3×23+2.3 5.4×11-5.410.7×16.1-15.1×10.77.74×(2.8-1.3)+1.5×2.2610.6×0.35-9.6×0.35 7.6×0.8+0.2×7.6五、简便运算1.28×8.6+0.72×8.60.65×101 8.9六、简便运算4.8×7.8+78×0.521.87×9.9+0.187 3.1412.7×9.9+1.27 3.65×4.7 -36.5×0.37 101七、用简便方法计算6.66×3.3+6.66×6.77.2×0.2+2.4×1.4 46×1.01 ×0.68+31.4×0.032 ×0.87-0.91×87×57+23×86篇二:小数乘法竖式计算练习题小数乘法的练习题一、一般乘法竖式计算题205×0.18305×0.142.03×0.1310.2×2.33.07×0.25 1031.07×1.82.01205×0.13 0.1022.4×0.96 0.565×0.7 0.00165.8×0.32 0.65×0.23 0.408×0.24 1.05×3.5 ×1.72.03×0.14 20.4×2.6 ×0.110.34×0.1260.32×0.14×0.150.18×4.3 0.36×2.3 ×13 0.65×0.17 0.62×5.2 ×7.3 72×0.038.7×0.92 1二、乘数中间有“0”的乘法56.2×4.08 2.02×3.6125×2.04 23.5×1.022.5×20.18.81×1.01 19.1×0.3072.01×1.03518×3.070.131×202 4.15×1.03 2.42×1.051.25×8.081.02×2.151.02×20.6三、积末尾有“0”的乘法18.6×1.5 2.06×0.25 2.8×0.165 2.36×0.351.25×8.80.24×2.50.025×14 1.05×351.6×0.85 0.35×8.042.25×2.4 0.15×2.82篇三:人教版数学五年级上册小数乘法练习题小数乘法练习题 (3)一、填空.1.小数乘以整数的意义与整数乘法的意义相同:就是求几个( )加数的和的简便运算.2.小数乘以整数的方法是,先把小数看成( )。
小数乘法口算500道+竖式300道(含答案)
小数乘法口算500道+竖式300道第一部分口算500道一.计算题(共50小题)1.直接写得数.0.5×1.4=80×0.125= 2.5×0.4=0.036×100=0.24×5=0.12×0.5=35÷1000= 2.2×0.5=0.12×5=0.04×0.1= 3.5+0.15=8﹣6.9=2.口算.0.4×5 1.2×44×1.51×0.50.01×0.1 1.25×0.40.36×0.20.8×03.直接写出得数.0.12×6= 1.25×0.4=30×0.8=12.5×0.8= 3.73﹣0.8﹣1.73= 3.26×0= 3.25+0.74= 5.2﹣2.64=0.24×5=4×0.05×2=3.9+7.1= 6.2×0.5=0.25×0.4=0.036×100= 3.64+6.36+5.5= 4.直接写出得数.0.4×0.02= 1.8×0.4=6×0.25= 1.25×0.8=3﹣0.98=0.9÷0.01= 3.9×0.01=99×0.25= 5.直接写得数:0.5×3=0.45+0.4=4×0.25=10.2+11.3= 0.09×100=8.7﹣0.5=0.96﹣0.7=12.9﹣2.9= 3.69×0=38.7÷10=6.直接写得数:0.2×3=0.45+0.4=4×0.25=18.7+11.3=0.09×100=8.7﹣0.5=0.96﹣0.7=18﹣1.67=1×8.79= 3.69×0=38.7÷10=2÷100=7.直接写出得数.0.28×10=0.9×5=8×0.06=0.05×1.6= 100×0.7= 2.5×8= 1.06×7=12.5×0= 1.7+3.3×0.2=0.2×0.2×0.2=8.直接写得数:0.2×36=0.45×2=4×0.25= 3.8÷100=0.09×1000=1﹣0.9=0.96﹣0.7= 2.5×7.4×4= 9.口算0.2×0.4=8.2+1.8= 6.45×0.01= 2.5×0.4=0.8×50= 2.4×5=0.9﹣0.52=10.2×4.5= 10.直接写出得数.0.7×0.9=0.14×0.3= 1.7×0.03=0.12×6=5.5×10= 2.6×0.5= 1.8×0.04= 2.6×2﹣0.5= 11.直接写出得数.5×1.8=0.8×1.5=0.65+0.35=9.8+1.2=0.25×4=1﹣0.63=10.75﹣0.5= 1.25×80=1.7×0.9= 4.6×0.5= 1.42×100=19.8﹣8= 12.直接写出得数.0.25×4= 1.25×8=8.2×6.9×0=0.2×18=6.29×100=0.02×500= 3.4×2=0.26×0.5= 13.直接写得数0.2×4=0.8×25=0.57+0.43= 2.8×10=18.4÷100= 2.5×0.4= 4.7﹣1.78=0.125×8=1.8×0.5=0.035×1000=14.口算0.4×20= 1.3×3=0.25×50=0.9×300 2.4×50=0.125×200=600×0.4=800×0.25=1500×0.2=15.列竖式计算.2.3×0.8= 6.9×3.1=9.87×1.8=24.5×6.820.6×4.5=10.2×5.01=16.直接写得数.3.14×7=52=6π=62﹣20=402﹣302=b×b= 3.14×302= 3.14×42= 1.25×32=b+b=17.直接写得数.0.16×5= 4.2×0.3=25×0.4=2×0.45=0.5×0.07=0.3×0.7×10=18.口算题.0.1×208= 2.8×2=3×0.18=0.2×600= 1.3×5=8×0.05= 1.3×50= 80×0.05=7.26×1=0.4×22=0.15×40=0.7×1.4=1.25×10= 4.5×0.02=0.03×8=0×1.001=0.8×12.5=0.4×0.7= 1.3×4= 1.35×10= 1.4×0.4=1.4×5= 1.45×100=3.5×40=0.02×38=25×0.4= 1.6×1.5=0.01×10= 250×0.04=1.5×0.02=0.05×12=200×0.05=2.5×0.4=0.05×430=20×0.5= 250×0.4=7.682×0=2×0.005= 2.05×2=19.直接写出得数.1.5×0.2= 1.25×0.8= 4.5×0.4=2.5×7×0.4=0.3×0.3=0.35+0.75=0.48+1.62=10.1×78=20.直接写出得数.0.2×8= 6.2+0.04= 2.5×0.4=0.6×0.7=18.5+71.5= 6.4+4.6=0.04×0.3= 2.1﹣2.01= 1.41×1000=21.直接写出得数45+426=58.7﹣38.5= 2.25×8= 2.7×0.8= 6.4×0.8=320×0.03=11.004×50= 4.8×9.8= 22.口算.2.4×0.3=0.25×4=0.06×0.8=8.5×0.2= 1.25×0.8=7.5×0.5=6×4.4=0.13×0.05=19×0.7=23.口算:0.9×0.3= 3.5×0.2= 2.1×0= 6.6×10=0.3×7= 0.27×3=3×9.6=0.8×1.5=7.2×0.6= 2.5×0.4= 24.口算0.37×10=0.37×100=0.37×1000= 2.5×4= 0.25×4= 4.8×2=0.12×0.3=2×5.8= 0.28×3=0.16×4= 3.5×2=5×1.2= 5×1.5=3×0.25= 3.5×0.2= 3.5×5= 5×0.25=0.3×0.2= 3.5×0.5=3×1.5= 25.直接写得数.0.5×6=0.125×8= 2.5×0.4= 3.1×0.3=4×0.25= 1.25×6=0.2×0.05=0.8×0.05= 1.7×0.3= 1.25×200=40×0.05=0.04×2=26.口算.0.2×50= 2.4×0.5=0.25×4= 3.2×0.3=12.5×80=0.17×10= 4.5+3.85= 2.5×0.7×0.4=3.5×8= 1.2×0.6= 5.2﹣2.8= 3.7+5.8=27.直接写得数.0.5×0.7= 2.1×0.4= 3.4×0.2=0.06×1.2=0.63×2=0.05×0.06=0.8×0.4=7.85×0.01= 0.15×0.4= 1.3×30=0.25×0.6= 3.125×100= 28.直接写出得数.12.5×8= 2.5×0.4= 6.4+4.6=0.04×0.3=0.5×2.4=0.2×2.5= 5.18+3.02= 1.41×1000=29.口算:0.3×4= 2.3×0.2= 3.6+6.4=0.6×0.7=1.6×0.4=0.9×0.08=0.25×4=12.5×8= 0.7×0.9=0.04×0.2=0.8×0.05=3.1×0.3= 0.16×0.5= 1.7×0.03= 1.8×0.04=0.12×6= 30.直接写得数0.8×25=0×4.23=0.57+0.43=0.02×500=12.5×8=50×0.04=80×0.3= 1.1×9=31.直接写得数.0.7×10 3.02×100 3.6×2 4×1.52.5×4 12.5×0.8 4.5+2.6 7﹣1.66.4﹣2.3 10+6.01 8.3﹣1.37.3+2.7 32.口算9.5×0.2= 3.2×0.5=0.8×2.5= 4.4×0.4=35×0.4=33.口算.0.8×7=0.9×0.3= 1.32×8=10.3×2=3.5×0.2=10×0.05=0.13×7=0.05×4=30×0.1=12.5×8= 3.25×0=0.4×50= 34.直接写出得数:2.5×4= 2.4×0.5=8×0.125=0.27×3=7﹣6.38=0.22×0.5=35.直接写出得数.(后两题得数保留一位小数)0.7×0.9=0.14×0.3= 1.7×0.03= 1.8×0.04≈0.12×6= 5.5×10= 2.6×0.5= 2.6×0.08≈36.直接写出得数0.45×0.2= 4.38+3.5=0.9×7=(3.85+5.45)×0=0.75×1= 2.5×4= 5.4×20=7.5×0.4=37.口算.2.3×2=10×0.2= 1.45×10= 4.3×10═ 2.4×5=4.5×0.9= 2.5×8= 3.9×3=5×0.01=5.98×1000= 38.直接写得数:2.5×33.06×2 0.25×44.2×105.3×100 2.5×62.2×4 1.6×4 1.25×839.口算.1.5×8=2.4×5= 1.25×8=3.58×2=0.5×0.9=40.直接写得数0.7×0.9=0.12×50=60×0.5= 1.8×0.04=1.25×8=24×0.05=0.15×0.4=0.9×1.5=3.4×0.7=0.78×0.2=30×0.5=0.8×0.9=41.口算.0.5×0.2=50×0.2=500×0.2= 2.4×4= 2.5×0.4= 0.25×40=0.125×8=12.5×8= 1.25×80=0.24×5= 42.口算:0.5×2=0.25×4=12.5×8=0.125×8=7÷0.7=1﹣0.125×8= 1.25×32=0.25×56=43.直接写出得数.0.4×0.3= 2.5×0.6=8.8×0.1= 1.3×0.2=5.28+1.6=10﹣1.7﹣2.3=6.09×0=100×0.7=44.直接写出得数0.5×0.2=0.25×0.4= 1.25×8=0×1000+3=0.5÷100=0.12×40=100×0.78=12.78+0.22=0.6+0+0.7=0.72+1000=45.直接写得数.0.5×0.2=4×0.15=50×0.4=8×0.125=0.23×10=0.12×7=46.直接写出得数.0.7×0.9= 2.6×0.5=0.14×0.3= 5.5×10=1.7×0.03= 1.8×0.04=0.12×6= 4.8×5= 47.口算0.2×0.4=8.2+1.8=100﹣35.22= 2.5×0.4=0.8×50=8×0.24= 3.9×1.3= 2.4×5=0.9﹣0.52=0×3.52=12.5×8= 2.4×0.01= 48.直接写得数0.8×0.6= 5.5×3=0.5×0.6=0.125×0.8=9.6×0.1= 0.07×0.9=12.4×0.2= 2.4×5=14×0.01= 1.5×2= 49.口算.0.37×100=0.25×4=0.3×0.2=70×0.12=18×0.3=0.5×0.6= 3.7×0.2=5×1.2=第二部分竖式300道一.计算题(共50小题)1.列竖式计算.75﹣8.49= 3.72×1.25= 5.04×26=5.94+12.7=0.95×6.7=35.62﹣13.4=2.竖式计算0.64×18=25.8×102=40.7×0.25=13.45×2.6=(保留整数) 4.865×8≈(保留整数)10.23×42≈(保留一位小数)3.竖式计算(前面有*要验算).2.18×3.6*4.23×0.8620.07×1.0250.6×0.90.57×0.86*0.8×0.314.用竖式计算.8×0.12=(验算) 1.9×3.5=(验算)0.401×0.3=0.45×0.96=0.17×0.71=5.竖式计算4.57×1.8 0.125×0.8 3.75×0.249.37×8.52.07×3.6 3.35×1.6.6.列竖式计算:1.8×0.36=35.37+28.63=19.9﹣8.75=1.06×0.48=18.9+28.65=22.87﹣18.65=7.竖式计算7.6×0.82= 3.25×0.31=7.5×0.59=(验算)8.列竖式计算,带*号的要验算.25.78+3.12=13.8×9=*8﹣2.67=*5.73+6.7=9.列竖式计算4.8×17 1.88×25 2.4×0.370.89×5.3.10.列竖式计算.3.8×0.15=4.6×50=8.7×2.04= 13.2×9.8=0.86×0.72=5﹣1.08=11.列竖式计算.(得数保留两位小数)2.375×105 5.16×4.3 0.45×0.206.12.用竖式计算.4.8×0.259.3×1.39.8×0.5 2.1×2.15.13.列竖式计算.0.04×0.12 4.25×8.8 3.84×0.25.14.用竖式计算.62.4+7.62= 6.07﹣4.993=8.7×1.4= 1.28×3.5=15.列竖式计算8×0.125 4.23×536.5×425×0.12618×1.833.42×2016.列竖式计算.2.3×0.8= 6.9×3.1=9.87×1.8=24.5×6.820.6×4.5=10.2×5.01=17.列式计算:2.02×2.410.33﹣9.083.88+1.5418.用竖式计算.3.5×7=8.1×16= 3.27×21=5.63×36= 4.32×7=64×0.07=19.用竖式计算.4.26×7.5= 3.15×1.4=47.5×0.6=5.25×0.24=7.38×2.5=14.24×0.35=1.21×8=2.4×0.2=0.57×0.43=20.列竖式计算.8.5×16= 4.15×24=0.32×7= 6.4×9= 2.5×36=0.04×270= 1.25×3= 3.75×6= 21.计算并验算.0.04×0.568.04×0.001 4.012×0.30.42×0.080.209×0.15 4.8×0.0015 87.5×2.410.28×0.731.4×3.822.列竖式计算0.82×2= 3.95×42= 2.073×15=0.78×24= 2.6×61=0.059×0.2= 4.268×1.7=57×5.7= 9.46×2.85=17.8×6.4= 1.5×4.9= 2.5×0.88=23.用竖式计算.1.24×0.8=0.85×1.2=7.05×2.4=12.3×2.4=60.5×400=89.3×7.6=24.竖式计算下面各题(得数保留两位小数)0.46×3.5=0.86×1.4=0.036×2.5=8.4×1.03=25.用竖式计算25﹣12.54= 1.59×2.4=2137÷29=26.直接写出得数.1.5×0.2= 1.25×0.8= 4.5×0.4=2.5×7×0.4= 0.3×0.3=0.35+0.75=0.48+1.62=10.1×78= 27.用竖式计算.5.08×0.65=54.68﹣12.8=19.92+420.26 7.02×0.67=28.用竖式计算.4.8×2.5=5.07×0.29=0.32×1.7≈(得数保留一位小数)4.08×6.7≈(得数保留两位小数) 6.03×0.74≈(得数保留两位小数)29.竖式计算(第一、第二道的数保留两位小数)3.52×0.05≈120.44×0.2≈8.25×1.48.76×3.5 4.25×0.4 2.7×1.631.竖式计算0.38×0.25 150×0.12 0.87×1.91.28×2.3 2.07×0.24 0.17×1.0532.用竖式计算,前两题要验算.0.65×4.7= 2.06×9.4=0.072×8.5=9.9×0.99= 2.04×0.8=33.列竖式计算.3.2×30= 1.25×4=4.2×15=11.5×108=0.28×4.5= 0.27×0.36= 2.6×3.8=250×0.98= 6.05×1.6=10.8×2.07=34.列竖式计算.0.54×2.7 2.8×7.4 15.4×0.7 27.5×3.4.27.6×0.45 8.08﹣2.68 5.546+29.380.023×1.817.04×0.26 8.35×3.5 5.08×0.25 1.18×3.436.列竖式计算.2.6×0.6 6.7×0.0715.6×1.3 0.81×2.7.37.用竖式计算:(得数保留一位小数)3.65×2.6 0.462÷2.80.627+3.3754.35﹣0.435.38.竖式计算31.5×24.5=0.8×0.56= 4.23×0.028=0.63×1.05=36×0.56= 2.5×2.05=(1)计算并验算.2.3×0.29= 2.7×1.02=(2)得数保留两位小数.0.45×0.96 6.53×0.75(3)得数保留一位小数.10.6×0.2622.45×0.4.40.列竖式计算下面各题并验算:0.34×2.5= 1.5×1.7=0.28×0.39= 4.2×2.4=41.用竖式计算.4.2×0.08= 1.5×6.2= 2.7×8.17=2.9×0.56=(保留两位小数) 6.23×4.2=(保留一位小数)42.列竖式计算.3.4×0.25 6.5×2.4 0.035×0.6 1.25×0.024.43.用竖式计算.84×0.25=0.55×64=0.47×5.8=6.06×0.32=0.075×0.07= 3.7×9.77=44.用竖式计算.5.08×0.65= 54.68﹣12.8= 80.4×0.35= 19.92+420.26=45.列竖式计算3.2×1.8= 1.05×62= 2.7×0.11=0.12×0.18=0.15×0.12= 2.7×1200=46.列竖式计算.7.6×0.82= 3.5×8.8= 3.25×0.31=0.93×2.02≈(结果精确到百分位) 5.9×3.14≈(结果保留一位小数)47.列竖式计算.1.2×1.36(结果保留两位小数)2.7×0.34(结果保留两位小数)0.74×5.8(结果保留两位小数) 2.6×3.5验算:0.25×0.12验算:48.用竖式计算18.8×38.2= 48×0.952=35.7×5.06≈(得数保留一位小数) 6.928×3.2≈(得数保留两位小数)49.用竖式计算.0.86×7= 3.3×16= 0.48×2.4= 1.7×0.45≈(保留两位小数)50.列竖式计算,带※的验算※0.38×0.25 1.07×2.1 (得数保留两位小数)7.4×2.84(得数保留一位小数) 1.08×9.5 0.75×1.02.第一部分口算500道参考答案与试题解析一.计算题(共50小题)1.【解答】解:0.5×1.4=0.780×0.125=10 2.5×0.4=10.036×100=3.60.24×5=1.20.12×0.5=0.0635÷1000=0.0352.2×0.5=1.10.12×5=0.60.04×0.1=0.0043.5+0.15=3.658﹣6.9=1.12.【解答】解:0.4×5=2 1.2×4=4.84×1.5=61×0.5=0.50.01×0.1=0.0011.25×0.4=0.50.36×0.2=0.0720.8×0=03.【解答】解:0.12×6=0.721.25×0.4=0.530×0.8=2412.5×0.8=10 3.73﹣0.8﹣1.73=1.2 3.26×0=0 3.25+0.74=3.995.2﹣2.64=2.560.24×5=1.24×0.05×2=0.43.9+7.1=11 6.2×0.5=3.10.25×0.4=0.10.036×100=3.63.64+6.36+5.5=15.5 4.【解答】解:0.4×0.02=0.0081.8×0.4=0.726×0.25=1.5 1.25×0.8=13﹣0.98=2.020.9÷0.01=903.9×0.01=0.03999×0.25=24.755.【解答】解:0.5×3=1.50.45+0.4=0.854×0.25=110.2+11.3=21.50.09×100=98.7﹣0.5=8.20.96﹣0.7=0.2612.9﹣2.9=103.69×0=038.7÷10=3.876.【解答】解:0.2×3=0.60.45+0.4=0.854×0.25=118.7+11.3=300.09×100=98.7﹣0.5=8.20.96﹣0.7=0.2618﹣1.67=16.331×8.79=8.793.69×0=038.7÷10=3.872÷100=0.027.【解答】解:0.28×10=2.80.9×5=4.58×0.06=0.480.05×1.6=0.08100×0.7=70 2.5×8=20 1.06×7=7.4212.5×0=01.7+3.3×0.2=2.360.2×0.2×0.2=0.0088.【解答】解:0.2×36=7.20.45×2=0.94×0.25=1 3.8÷100=0.0380.09×1000=901﹣0.9=0.10.96﹣0.7=0.262.5×7.4×4=749.【解答】解:0.2×0.4=0.088.2+1.8=106.45×0.01=0.06452.5×0.4=10.8×50=40 2.4×5=120.9﹣0.52=0.2810.2×4.5=45.910.【解答】解:0.7×0.9=0.630.14×0.3=0.0421.7×0.03=0.0510.12×6=0.725.5×10=55 2.6×0.5=1.3 1.8×0.04=0.0722.6×2﹣0.5=4.711.【解答】解:5×1.8=90.8×1.5=1.20.65+0.35=19.8+1.2=110.25×4=11﹣0.63=0.3710.75﹣0.5=10.251.25×80=1001.7×0.9=1.534.6×0.5=2.31.42×100=14219.8﹣8=11.812.【解答】解:0.25×4=1 1.25×8=108.2×6.9×0=00.2×18=3.66.29×100=6290.02×500=103.4×2=6.80.26×0.5=0.1313.【解答】解:0.2×4=0.80.8×25=200.57+0.43=1 2.8×10=2818.4÷100=0.1842.5×0.4=1 4.7﹣1.78=2.920.125×8=11.8×0.5=0.90.035×1000=3514.【解答】解:0.4×20=8 1.3×3=3.90.25×50=12.50.9×300=2702.4×50=1200.125×200=25600×0.4=240800×0.25=2001500×0.2=30015.【解答】解:2.3×0.8=1.84 6.9×3.1=21.399.87×1.8=17.76624.5×6.8=166.620.6×4.5=92.710.2×5.01=51.10216.【解答】解:3.14×7=21.9852=256π=18.8462﹣20=16402﹣302=700b×b=b2 3.14×302=28263.14×42=50.241.25×32=40b+b=2b17.【解答】解:0.16×5=0.84.2×0.3=1.2625×0.4=102×0.45=0.90.5×0.07=0.0350.3×0.7×10=2.118.【解答】解:0.1×208=20.82.8×2=5.63×0.18=0.540.2×600=1201.3×5=6.58×0.05=0.41.3×50=6580×0.05=47.26×1=7.260.4×22=8.80.15×40=0.60.7×1.4=0.981.25×10=12.54.5×0.02=0.090.03×8=0.240×1.001=00.8×12.5=100.4×0.7=0.281.3×4=4.21.35×10=13.51.4×0.4=0561.4×5=7 1.45×100=1453.5×40=1400.02×38=0.7625×0.4=101.6×1.5=2.40.01×10=0.1250×0.04=101.5×0.02=0.030.05×12=0.6200×0.05=102.5×0.4=10.05×430=21.520×0.5=10250×0.4=1007.682×0=02×0.005=0.012.05×2=4.119.【解答】解:1.5×0.2=0.3 1.25×0.8=1 4.5×0.4=1.82.5×7×0.4=7 0.3×0.3=0.090.35+0.75=1.10.48+1.62=2.110.1×78=787.8 20.【解答】解:0.2×8=1.6 6.2+0.04=6.24 2.5×0.4=10.6×0.7=0.4218.5+71.5=90 6.4+4.6=110.04×0.3=0.0122.1﹣2.01=0.091.41×1000=141021.【解答】解:45+426=47158.7﹣38.5=20.22.25×8=18 2.7×0.8=2.16 6.4×0.8=5.12320×0.03=9.611.004×50=550.24.8×9.8=47.04 22.【解答】解:2.4×0.3=0.720.25×4=10.06×0.8=0.0488.5×0.2=1.7 1.25×0.8=17.5×0.5=3.756×4.4=26.40.13×0.05=0.006519×0.7=13.323.【解答】解:0.9×0.3=0.273.5×0.2=0.72.1×0=0 6.6×10=660.3×7=2.1 0.27×3=0.813×9.6=28.80.8×1.5=1.27.2×0.6=4.322.5×0.4=1 24.【解答】解:0.37×10=3.70.37×100=370.37×1000=3702.5×4=100.25×4=1 4.8×2=9.60.12×0.3=0.0362×5.8=11.60.28×3=0.840.16×4=0.643.5×2=75×1.2=65×1.5=7.53×0.25=0.753.5×0.2=0.7 3.5×5=17.55×0.25=1.250.3×0.2=0.063.5×0.5=1.753×1.5=4.5 25.【解答】0.5×6=30.125×8=1 2.5×0.4=1 3.1×0.3=0.934×0.25=1 1.25×6=7.50.2×0.05=0.010.8×0.05=0.041.7×0.3=0.511.25×200=25040×0.05=20.04×2=0.08 26.【解答】解:0.2×50=10 2.4×0.5=1.20.25×4=1 3.2×0.3=0.9612.5×80=10000.17×10=1.74.5+3.85=8.352.5×0.7×0.4=0.7 3.5×8=28 1.2×0.6=0.725.2﹣2.8=2.4 3.7+5.8=9.527.【解答】解:0.5×0.7=0.35 2.1×0.4=0.84 3.4×0.2=0.680.06×1.2=0.072 0.63×2=1.260.05×0.06=0.0030.8×0.4=0.327.85×0.01=0.0785 0.15×0.4=0.061.3×30=390.25×0.6=0.153.125×100=312.5 28.【解答】解:直接写出得数:12.5×8=1002.5×0.4=1 6.4+4.6=110.04×0.3=0.0120.5×2.4=1.20.2×2.5=0.055.18+3.02=8.21.41×1000=1410 29.【解答】0.3×4=1.2 2.3×0.2=0.46 3.6+6.4=100.6×0.7=0.421.6×0.4=0.640.9×0.08=0.0720.25×4=112.5×8=1000.7×0.9=0.630.04×0.2=0.0080.8×0.05=0.04 3.1×0.3=0.930.16×0.5=0.081.7×0.03=0.0511.8×0.04=0.0720.12×6=0.72 30.【解答】解:0.8×25=200×4.23=00.57+0.43=10.02×500=1012.5×8=10050×0.04=280×0.3=241.1×9=9.931.【解答】解:0.7×10=7 3.02×100=302 3.6×2=7.2 4×1.5=62.5×4=10 12.5×0.8=10 4.5+2.6=7.1 7﹣1.6=5.46.4﹣2.3=4.1 10+6.01=16.01 8.3﹣1.3=77.3+2.7=1032.【解答】解:9.5×0.2=1.93.2×0.5=1.60.8×2.5=24.4×0.4=1.7635×0.4=14 4.8×50=2404.8×0.25=1.28.8×5=441.4×0.5=0.712.5×4=50 33.【解答】解:0.8×7=5.60.9×0.3=0.271.32×8=10.5610.3×2=20.63.5×0.2=0.710×0.05=0.50.13×7=0.910.05×4=0.230×0.1=312.5×8=100 3.25×0=00.4×50=2034.【解答】解:2.5×4=10 2.4×0.5=1.28×0.125=10.27×3=0.817﹣6.38=0.620.22×0.5=0.1135.【解答】解:0.7×0.9=0.630.14×0.3=0.0421.7×0.03=0.0511.8×0.04≈0.10.12×6=0.725.5×10=55 2.6×0.5=1.3 2.6×0.08≈0.2 36.【解答】解:0.45×0.2=0.094.38+3.5=7.880.9×7=6.3(3.85+5.45)×0=00.75×1=0.75 2.5×4=10 5.4×20=1087.5×0.4=337.【解答】解:2.3×2=4.610×0.2=21.45×10=14.54.3×10═432.4×5=124.5×0.9=4.052.5×8=203.9×3=11.75×0.01=0.055.98×1000=5980 38.【解答】解:2.5×3=7.53.06×2=6.12 0.25×4=14.2×10=425.3×100=5302.5×6=152.2×4=8.8 1.6×4=6.4 1.25×8=1039.【解答】解:1.5×8=122.4×5=12 1.25×8=103.58×2=7.16 0.5×0.9=0.451.2×6=7.2 0.2×0.9=0.18 0.72×5=3.6 0.37×4=1.48 0.25×0.4=0.1 40.【解答】解:0.7×0.9=0.630.12×50=660×0.5=30 1.8×0.04=0.0721.25×8=1024×0.05=1.20.15×0.4=0.060.9×1.5=1.353.4×0.7=2.380.78×0.2=0.15630×0.5=150.8×0.9=0.7241.【解答】解:(1)0.5×0.2=0.1(2)50×0.2=10(3)500×0.2=100(4)2.4×4=9.6(5)2.5×0.4=1(6)0.25×40=10(7)0.125×8=1(8)12.5×8=100(9)1.25×80=100(10)0.24×5=1.242.【解答】解:0.5×2=10.25×4=112.5×8=1000.125×8=17÷0.7=101﹣0.125×8=01.25×32=800.25×56=1443.【解答】解:0.4×0.3=0.122.5×0.6=1.58.8×0.1=0.881.3×0.2=0.265.28+1.6=6.8810﹣1.7﹣2.3=66.09×0=0100×0.7=7044.【解答】解:0.5×0.2=0.10.25×0.4=0.1 1.25×8=100×1000+3=30.5÷100=0.0050.12×40=4.8100×0.78=7812.78+0.22=130.6+0+0.7=1.30.72+1000=1000.7245.【解答】解:0.5×0.2=0.14×0.15=0.650×0.4=208×0.125=10.23×10=2.30.12×7=0.8446.【解答】解:0.7×0.9=0.63 2.6×0.5=1.30.14×0.3=0.0425.5×10=551.7×0.03=0.0511.8×0.04=0.0720.12×6=0.72 4.8×5=2447.【解答】解:0.2×0.4=0.088.2+1.8=10100﹣35.22=64.782.5×0.4=10.8×50=408×0.24=1.923.9×1.3=5.07 2.4×5=120.9﹣0.52=0.380×3.52=012.5×8=100 2.4×0.01=0.02448.【解答】解:0.8×0.6=0.48 5.5×3=16.50.5×0.6=0.30.125×0.8=0.19.6×0.1=0.96 0.07×0.9=0.06312.4×0.2=2.482.4×5=1214×0.01=0.141.5×2=3 49.【解答】解:0.37×100=370.25×4=10.3×0.2=0.0670×0.12=8.418×0.3=5.40.5×0.6=0.33.7×0.2=0.745×1.2=6第二部分竖式300道参考答案与试题解析一.计算题(共50小题)1.【解答】解:(1)75﹣8.49=66.51;(2)3.72×1.25=4.65;(3)5.04×26=131.04;(4)5.94+12.7=18.64;(5)0.95×6.7=6.365;(6)35.62﹣13.4=22.22.2.【解答】解:0.64×18=11.5225.8×102=2631.640.7×0.25=10.17513.45×2.6≈35 4.865×8≈3910.23×42≈429.73.【解答】解:2.18×3.6=4.848*4.23×0.86=3.6378验算:20.07×1.025=20.571750.6×0.9=0.540.57×0.86=0.4902*0.8×0.31=0.248验算:4.【解答】解:①8×0.12=0.96 ② 1.9×3.5=6.65③0.401×0.3=0.1203④0.45×0.96=0.432⑤0.17×0.71=0.12075.【解答】解:(1)4.57×1.8=8.226;(2)0.125×0.8=0.1;(3)3.75×0.24=0.9;(4)9.37×8.5=79.645;(5)2.07×3.6=7.452;(6)3.35×1.6=5.36.6.【解答】解:1.8×0.36=0.64835.37+28.63=6419.9﹣8.75=11.15 1.06×0.48=0.508818.9+28.65=47.5522.87﹣18.65=4.227.【解答】解:(1)7.6×0.82=6.232;(2)3.25×0.31=1.0075;(3)7.5×0.59=4.425.8.【解答】解:25.78+3.12=28.913.8×9=124.2*8﹣2.67=5.33验算:*5.73+6.7=12.43验算:9.【解答】解:4.8×17=81.6 1.88×25=47 2.4×0.37=0.8880.89×5.3=4.71710.【解答】解:3.8×0.15=0.57 4.6×50=2308.7×2.04=17.74813.2×9.8=129.360.86×0.72=0.61925﹣1.08=3.9211.【解答】解:2.375×105≈249.38 5.16×4.3≈22.190.45×0.206≈0.0912.【解答】解:4.8×0.25=1.29.3×1.3=12.099.8×0.5=4.9 2.1×2.15=4.51513.【解答】解:0.04×0.12=0.0048 4.25×8.8=37.43.84×0.25=0.95214.【解答】解:62.4+7.62=70.02 6.07﹣4.993=1.0778.7×1.4=12.18 1.28×3.5=4.4815.【解答】解:(1)8×0.125=1(2)4.23×5=21.15(3)36.5×4=146(4)25×0.126=3.15(5)18×1.8=32.4(6)33.42×20=668.416.【解答】解:2.3×0.8=1.84 6.9×3.1=21.399.87×1.8=17.76624.5×6.8=166.620.6×4.5=92.710.2×5.01=51.10217.【解答】解:2.02×2.4=4.84810.33﹣9.08=1.253.88+1.54=5.4218.【解答】解:3.5×7=24.58.1×16=129.6 3.27×21=68.67 5.63×36=202.68 4.32×7=30.2464×0.07=4.4819.【解答】解: 4.26×7.5=31.95 3.15× 1.4=4.4147.5×0.6=28.5 5.25×0.24=1.267.38×2.5=18.4514.24×0.35=4.984 1.21×8=9.68 2.4×0.2=0.480.57×0.43=0.245120.【解答】解:8.5×16=136; 4.15×24=99.6;0.32×7=2.24; 6.4×9=57.6; 2.5×36=90;0.04×270=10.8; 1.25×3=3.75; 3.75×6=22.5;21.【解答】解:0.56×0.04=0.0224验算:8.04×0.001=0.00804验算: 4.012×0.3=1.2036验算:0.42×0.08=0.0336验算:0.209×0.15=0.03135验算:4.8×0.0015=0.0072验算:87.5×2.4=210验算:10.28×0.7=7.196验算:31.4×3.8=119.32验算:22.【解答】解:0.82×2=1.64 3.95×42=165.9 2.073×15=31.0950.78×24=18.72 2.6×61=158.60.059×0.2=0.0118 4.268×1.7=7.255657×5.7=32.499.46×2.85=26.96117.8×6.4=113.92 1.5×4.9=7.35 2.5×0.88=2.223.【解答】解: 1.24×0.8=0.9920.85× 1.2=1.027.05×2.4=16.9212.3×2.4=29.5260.5×400=242089.3×7.6=678.6824.【解答】解:0.46×3.5=1.610.86×1.4≈1.200.036×2.5=0.098.4×1.03≈8.6525.【解答】解:25﹣12.54=12.46 1.59×2.4=3.8162137÷29≈73.726.【解答】解:1.5×0.2=0.3 1.25×0.8=1 4.5×0.4=1.82.5×7×0.4=70.3×0.3=0.090.35+0.75=1.10.48+1.62=2.110.1×78=787.827.【解答】解: 5.08×0.65=3.30254.68﹣12.8=41.8819.92+420.26=440.187.02×0.67=4.7034 28.【解答】解:4.8×2.5=12 5.07×0.29=1.47030.32×1.7≈0.54.08×6.7≈27.34 6.03×0.74≈4.4629.【解答】解:3.52×0.05≈0.18120.44×0.2≈24.098.25×1.4=11.558.76×3.5=30.66 4.25×0.4=1.7 2.7×1.6=4.3230.【解答】解:(1)0.43×27≈11.6(结果保留一位小数)(2)0.04×0.12=0.0048 (3)3.84×2.6≈10.0(保留一位小数)(4)5.76×3=17.28(5)8.3×0.15≈1.25(结果精确到百分位)(6)0.125×1.4≈0.18(保留两位小数)(7)4.8×0.25=1.231.【解答】解:0.38×0.25=0.095150×0.12=180.87×1.9=1.653 1.28×2.3=2.944 2.07×0.24=0.49680.17×1.05=0.178532.【解答】解:0.65× 4.7=3.055 2.06×9.4=19.3640.072×8.5=0.6129.9×0.99=9.801 2.04×0.8=1.63233.【解答】解:3.2×30=96 1.25×4=5 4.2×15=6311.5×108=12420.28×4.5=1.260.27×0.36=0.0972 2.6×3.8=9.88250×0.98=245 6.05×1.6=9.6810.8×2.07=22.35634.【解答】解:(1)0.54×2.7=1.458;(2)2.8×7.4=20.72;(3)15.4×0.7=10.78;(4)27.5×3.4=93.5.35.【解答】解:27.6×0.45=12.428.08﹣2.68=5.4 5.546+29.38=34.9260.023×1.8=0.248417.04×0.26=4.43048.35×3.5=29.225 5.08×0.25=1.27 1.18×3.4=4.01236.【解答】解:2.6×0.6=1.56 6.7×0.07=0.46915.6×1.3=20.280.81×2.7=2.18737.【解答】解:①3.65×2.6≈9.5②0.462÷ 2.8≈0.2③0.627+3.375≈ 4.0④4.35﹣0.435≈3.938.【解答】解:31.5×24.5=771.750.8×0.56=0.448 4.23×0.028=0.118440.63×1.05=0.661536×0.56=0.2016 2.5×2.05=5.12539.【解答】解:(1)2.3×0.29=0.667 2.7×1.02=2.754(2)0.45×0.96≈0.43 6.53×0.75≈4.90(3)10.6×0.26≈2.822.45×0.4≈9.040.【解答】解:0.34×2.5=0.85;1.5× 1.7=2.55;0.28×0.39=0.1092; 4.2×2.4=10.08.41.【解答】解:4.2×0.08=0.336 1.5×6.2=9.3 2.7×8.17=22.059 2.9×0.56≈ 1.62 6.23× 4.2≈26.242.【解答】解:①3.4×0.25=0.85②6.5×2.4=15.6③0.035×0.6=0.021④1.25×0.024=0.0343.【解答】解:84×0.25=210.55×64=35.20.47×5.8=2.726 6.06×0.32=1.93920.075×0.07=0.00525 3.7×9.77=36.14944.【解答】解:5.08×0.65=3.30254.68﹣12.8=41.8880.4×0.35=28.1419.92+420.26=440.1845.【解答】解:3.2×1.8=5.76 1.05×62=65.12.7×0.11=0.2970.12×0.18=0.02160.15×0.12=0.018 2.7×1200=324046.【解答】解:(1)7.6×0.82=6.232(2)3.5×8.8=30.8(3)3.25×0.31=1.0075(4)0.93×2.02≈1.88(5)5.9×3.14≈18.547.【解答】解:(1)1.2×1.36≈1.63 (2)2.7×0.34≈0.92 (3)0.74×5.8≈4.29(4)2.6×3.5=9.1验算:(5)0.25×0.12=0.03验算:48.【解答】解:18.8×38.2=718.16;48×0.952=45.696;35.7×5.06≈180.6;(得数保留一位小数) 6.928×3.2≈22.17;(得数保留两位小数)49.【解答】解:(1)0.86×7=6.02(2)3.3×16=52.8(3)0.48×2.4=1.152(4)1.7×0.45≈0.77(保留两位小数)50.【解答】解:0.38×0.25=0.095验算:1.07×2.1≈ 2.257.4× 2.84≈21.0 1.08×9.5=10.260.019×5.7=0.10830.75×1.02=0.765。
小学数学五年级上册《小数乘法》练习题(共5组,附参考答案)
班级考号姓名总分班级考号姓名总分班级考号姓名总分班级考号姓名总分班级考号姓名总分附:参考答案(一)一、填空。
1、小数乘整数的意义与整数乘法的意义相同:就是求几个(相同) 加数的和的简便运算。
) ,小数末尾有零的一般都要去掉。
2、小数乘整数的方法是,先把小数看成(整数) ,再按整数乘法的法则算出积,然后看因数中一共有几位小数,就从积的右边起数出几位点上(小数3、(1)3.9扩大(10)倍是39。
(2)把0.67扩大到它的(100)倍是67。
(3)78缩小到它的(1/1000)是0.078。
把567缩小到原来的1/1000是(0.567)。
1、(4)口算下列各题。
二、60.6×10=305 3.05×100=0.6936.93÷10=345÷1000=0.3450.2×25=57.7×100=77040.8×5=0.6×11=6.6三、列竖式计算。
7.5×16=1203.15×24=75.60.52×7=3.642.4×36=86.40.06×270=16.23.25×6=19.5四、根据48×25=1200,在()里填上适当的数。
0.48×25=(12)48×2.5=(120)48×0.25=(12)五、解决问题。
1、一个正方形边长是0.25米,这个正方形的周长是多少米?0.25×4=1(米)答:这个正方形的周长是1米。
2、一根绳子对折4次后,每段长1.52米,这根绳子的总长是多少米?1.52×16=24.32(米)答:这根绳子的总长是24.32米。
(二)一、填空。
1、小数乘小数的计算方法:(1)先按照(整数)乘法算出积,再点(小数点)。
(2)点小数点时,看两个因数中一共有几位小数,就从积的右边起数出几位点上(小数点)。
人教版数学五年级上册单元测试卷-第一单元 小数乘法(含答案)
人教版数学五年级上册单元测试卷第一单元小数乘法学校:___________姓名:___________班级:___________考号:___________题号一二三四五六七八总分得分一、选择题1.与11.6×101得数相等的算式是()。
A.11.6×100+11.6B.11.6×(100-1)C.11.6×100+12.最小的一位小数与最小的两位小数相乘,积是()。
A.0.001B.0.01C.0.13.0.01×100的积()0.1×10的积。
A.大于B.小于C.等于4.一个数乘小数的积()这个数。
A.大于B.小于C.等于D.以上三种情况都有可能5.5.1×9.9得数接近的算式是()A.5 ×10B.5×9C.6×9二、文字题6.列式计算.1、21.3的十分之三是多少?2、一种铁棒每米重4.5千克,0.75米重多少千克?3、比3.12的5倍多0.78的数是多少?三、脱式计算7.脱式计算。
(能简算的要简算)--⨯++++90.4532.44 6.8941998199.819.98 1.998 2.222680.118.9 6.8⨯+⨯ 9.99222 3.33334⨯+⨯四、竖式计算8.计算下面各题,并且验算:(1)0.32×0.25; (2)2.6×1.08; (3)7.8×1.05; (4)0.062×2.2。
五、口算和估算9.口算。
7.38-5= 8.73+2.07= 0.49×100= 50×60=2.45+1.2= 9.6-2.6= 7.2÷10= 25×20=六、填空题10.两个数的积是1.24,如果其中一个因数扩大到它的100倍,另一个因数缩小到它的10倍,积变成了( )。
11.2.6时=( )分;150千克=( )吨。