小数乘法脱式计算练习

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数学小数乘法练习题(多组)

数学小数乘法练习题(多组)

小数乘法练习(一)一、口算。

1.2×3= 4.2×8= 1.7×9= 0.12×4=0.11×3= 1.5×4= 5.6×0= 2.4×3=1.25×3= 1.5×5= 8.5+2.5= 6.5×3=1.02×0.2= 0.45×0.6= 0.8×0.125= 0.759×0=0.25×0.4 = 0.067×0.1= 0.1×0.08= 0.85×0.4=二、在下面各式的积中点上小数点。

0 . 5 8 6 . 2 5 2 . 0 4× 4. 2 × 0 . 1 8 × 2 81 1 6 5 0 0 0 1 6 3 22 3 2 6 2 5 4 0 82 43 6 1 1 2 5 0 5 7 1 2三、判断,把不对的改正过来。

0.024 0.013× 0.14 × 0.02696 7824 260.036 0.000338四、根据1056×27=28512,写出下面各题的积。

105.6×2.7= 10.56×0.27= 0.1056×27= 1.056×0.27=五、先判断积里应该有几位小数,再竖式计算。

3.7×4.6= 0.82×0.06= 6.5×4.8=(验算)六、填一填。

把1.2的小数点去掉,它的值就扩大()倍;把0.019的小数点去掉,这个数就扩大()倍。

七、列式计算。

3.05的7.3倍是多少?八、判断。

(1)小数一定比整数大。

……………………………………………………()(2)两个因数的小数位数的和是3,积的小数位数也一定是3。

…………()小数乘法练习(二)1、用简便方法计算下面各题,并说明运用了什么运算定律。

小数乘法简便脱式计算练习题

小数乘法简便脱式计算练习题

小数乘法简便脱式计算练习题7.28×99+7.284.3×50×0.64-2.64×0.×0.283.94+34.3×0.28.9×1.1×4.732+4.9-0.94.8×100.112.5×0.4×2.5×82.7×5.4×3.6.58×4.5×0.9×810.8-0.8×7.0 0.87×3.16+4.641.2×÷4.8.6×9.85-5.466.5×99+56.54.8+ 0.3÷ 1.0.6÷× 1.258.05×3.4+7.6.8×0.5+1.584.8-4.8×0..5×10117.-.×..09×8.×40.÷ 0.81 × 0.184.× .13.×0.×826.81+6.81×99 0.25×185×40.4×0.8-3.4×0. ×..2.×1.25+4.2×1.752.37×6.3+2.37×3.70.25×39+0.25×1.256.8×0.75÷0.513.5×0.982.5×1.25×0.3 0.125×7299.75÷0.125–2.7 12.5×8..8×10.1×0.33+54×0.30.25×185×407.2.5×.69×1013.8×10.1 .5×9.81+6.81× 1.53+23.4÷小数乘法分类练习口算练习一A25×4= 0.4×2.5= 125×8= 0.8×12.5=0×0.02=15×0.3= 0.32×0.3= 0.2×0.5=3.6×0.= 0.4×0.25=0.5×0.=3.6×0.5= 0.38×0.5=1.2×0.5= 0.16×6=2.3×0.=0.6×0.5=B0.02×14=0.4×8=.5×6=.2×1=0.5×10=3.2×4=.19×20=.8×100=0.08×3=0.9×100=3.5×10=×0.02= 0.4×5= .2×2= 0.08×5=5.19×100= .18×10=C3.9×20=0.11×8= .6×0.3= 15.5×3=8.8×0.1=2.5×0.4= 1.25×4= 0.36×10=.8×4=9.6×0=0.19×100= 0.25×40= 0.125×80=20.3×4=1.8×0.5=0.16×5= 10.9×0.5=口算练习二默认分类010-09-261:14:11 阅读21 评论0字号:大中小订阅A3.6×20= 0×0.05= 0.5×0.4=.4×4+5.6×4=70×0.04=.7×0.01= 1.25×2×0.4=1.25×4=0.09×5= .5×0.2= .2×0=0.5×0.02=40×0.8= 1.5×0.6=1.12×100= +0.3×0.5=0.04×25=B3×0.2×0.5= 1.25×0.8=×3.7×0.25= .6×0.1=0.18×0.3= .6×5=0.05×0.8=+0.17×0.1=1×0.02= 1.2×0.5=0.4×1.5×10=0.62×0.2=7×0.5= .6×0.2×1=.3×101=5×8×125×4=0.9×6=C0.1×0.01=0.7×6–6×0.3=0.2×0.9=1.7×25×4=1.4×0.2=0.5×2.5=1.8×6–1.8= 1.7×3=0.32×0.2×5=7×0.08=10–0.8×10= 1.6×5=0.37×20=.8×9+2.8=5.6×1.01=3.06×0.2=12×2.5=口算练习三默认分类010-09-261:19:5阅读3评论0字号:大中小订阅A3.2÷1.6=.4÷10=0.96÷0.06= 0.1÷0.01=6÷0.03=9.6÷1.6=0.49÷0.7=5.2÷1.3=77÷7.7=0÷4.8=.1÷7=.8÷2.2=1.8÷0.9=8= ÷5.7=0.72÷5.78.5÷5=.4÷4.2=1÷4=0.81÷0.9= .2÷0.01=0.36÷1.8= 0.56÷0.7=2.8÷0.8=0.84÷0.6= 16÷1.6=19.6÷2=0.36÷3= 1.6÷0.04= 1.2÷0.3=3.6÷0.1=C0.45÷0.15=0.24÷0.3=3.2÷100=0.45÷0.9=0.51÷17=0.84÷6=0.5÷0.1= .8÷7=1.9÷0.19= .5÷1.7=7.5×4= 0.04×25=5×0.4=1.2×0.5=0×0.9=口算练习四默认分类010-09-261:25:01 阅读3评论0字号:大中小订阅A4.5×0.1=.5×0.5= 0.15÷0.5=4.2÷0.1=12÷0.3=2.87÷0.7= 1.6×0.05=.5×0.04= 1.5×8=0.8×0.08=0.2×0.5=0.13×0.4=0.5×0.6=1.4×0.6= ÷0.14=B2.1×3÷2.1=÷0.5= 0.3÷10=8.6÷1000=1.7×0.25×4=4.5×0.2=0.24÷0.6= 0.9×0.6= 0.1×0.1 =÷2.5=2.8÷0.04=0.6×1.2= 100÷0.01=0.72÷0.3=3.6÷0.1C2.5×20=7÷0.5= ÷0.8=.7÷0.29=.2÷0.3=0.72÷0.12=0.9÷0.01=7×5.3÷5.3=.6×0.2×1=45÷0.5÷2=0.96÷0.3=0.45÷0.09= 0.35÷0.7=64.32÷16=7÷0.01 笔算练习二默认分类010-09-261:41:21 阅读9评论0字号:大中小订阅A1.73×12.5×0.82.8×3.5-3.5+9.2×3.536.4+68.8-7.351.25×6.412.5×0.32×0.9.5×0.02×0.8×1.255.5×1.5×0.12.07×8.6+9.125B23.13+25×0.16+1.87[-0.8]×0.40.8××512.5×0.32×0.2510.64+7.65×2.4+11.718.+.1 + 1.+.925.6-9.94.5×25×4×2C9.5×3+7×9.4.02-3.5+0.985.7+0.3-5.7+0.1.7-1.8-3.23.8×9.9+3.83.5×37+6.5×371.65×2.3+6.7×1.688×1.25D12.5×4.80.25×3.2×42.5×7.5+2.5×2.63×10.13.25-0.84-1.16.41×10.12.63×9..61×9+7.61E0.25×4888×1.2522.7×1.25×0.0.55×991.5×1.3×2.7+3.1+2.9+3.225-4.9-6.13.5×4.8+2.2×2.4F131+132+130+129.5×0.02×0.8×1.255.5×1.5×0.12.07×8.6+9.1256.41×10.12.63×9.92、用竖式计算0.396÷1.2= 0.756÷0.36= 15.6×13=0.18×15= 0.025×14=3.06×36= 0.04×0.12=3.84×2.6≈ .76×3=7.15×20.75÷3..68×0.216.9÷0.1313.76×0.8=5.2×0.6.4×1..4×0.535.4×4.20.042×0.540.76×0.30.25×0.0460.12×0.5×0.16=.8×0.25=0.125×1.4≈1.55÷3.94.48×0.42.52×3.42.5÷0.7= .7×0.0165.25×1.08×保留三位小数)10.75÷12.5=.25×9.04=3、脱式计算2.5×7.1×16.12×99+16.12.2×0.9+0.9.28×99+7.2.3×50×0.264-2.64×0.53.94+34.3×0.28.9×1.1×4.74.8-4.8×0.54.8×100.126×15.7+15.7×242.7×5.4×3.96.58×4.5×0.9+ 4.9-0.910.8-0.8×7.09×0.1.2×÷4..6×9.85-5.4.05×3.4+7.62.8×0.5+1.5 -0.125)×86.5×99+56..8+ 0.3÷1.12.5×0.4×2.5×8×..5×1.25×0.3.5×.8×10.10.2 5×39+0.25×1.26.81+6.81×99.75÷0.125–2.751.53+23.4÷7.12.5×8.84. 2.×1.25+ 4.2×1.7.69×1010.125×7 0.25×185×40.5×994.4×一.判断题 1个数除以小数,商一定被除数大。

五年级上册数学小数乘法练习题(多组)

五年级上册数学小数乘法练习题(多组)

小学数学五年级上册第一单元小数乘法练习(一)一、口算。

1.2×3= 4.2×8= 1.7×9= 0.12×4=0.11×3= 1.5×4= 5.6×0= 2.4×3=1.25×3= 1.5×5= 8.5+2.5= 6.5×3=1.02×0.2= 0.45×0.6= 0.8×0.125= 0.759×0=0.25×0.4 = 0.067×0.1= 0.1×0.08= 0.85×0.4=二、在下面各式的积中点上小数点。

0 . 5 8 6 . 2 5 2 . 0 4× 4. 2 × 0 . 1 8 × 2 81 1 6 5 0 0 0 1 6 3 22 3 2 6 2 5 4 0 82 43 6 1 1 2 5 0 5 7 1 2三、判断,把不对的改正过来。

0.024 0.013× 0.14 × 0.02696 7824 260.036 0.000338四、根据1056×27=28512,写出下面各题的积。

105.6×2.7= 10.56×0.27= 0.1056×27= 1.056×0.27=五、先判断积里应该有几位小数,再竖式计算。

3.7×4.6= 0.82×0.06= 6.5×4.8=(验算)六、填一填。

把1.2的小数点去掉,它的值就扩大()倍;把0.019的小数点去掉,这个数就扩大()倍。

七、列式计算。

3.05的7.3倍是多少?八、判断。

(1)小数一定比整数大。

……………………………………………………()(2)两个因数的小数位数的和是3,积的小数位数也一定是3。

…………()小数乘法练习(二)1、用简便方法计算下面各题,并说明运用了什么运算定律。

数学小数乘法练习题(多组)

数学小数乘法练习题(多组)

小数乘法练习(一)一、口算。

1.2×3= 4.2×8= 1.7×9= 0.12×4=0.11×3= 1.5×4= 5.6×0= 2.4×3=1.25×3= 1.5×5= 8.5+2.5= 6.5×3=1.02×0.2= 0.45×0.6= 0.8×0.125= 0.759×0=0.25×0.4 = 0.067×0.1= 0.1×0.08= 0.85×0.4=二、在下面各式的积中点上小数点。

0 . 5 8 6 . 2 5 2 . 0 4× 4. 2 × 0 . 1 8 × 2 81 1 6 5 0 0 0 1 6 3 22 3 2 6 2 5 4 0 82 43 6 1 1 2 5 0 5 7 1 2三、判断,把不对的改正过来。

0.024 0.013× 0.14 × 0.02696 7824 260.036 0.000338四、根据1056×27=28512,写出下面各题的积。

105.6×2.7= 10.56×0.27= 0.1056×27= 1.056×0.27=五、先判断积里应该有几位小数,再竖式计算。

3.7×4.6= 0.82×0.06= 6.5×4.8=(验算)六、填一填。

把1.2的小数点去掉,它的值就扩大()倍;把0.019的小数点去掉,这个数就扩大()倍。

七、列式计算。

3.05的7.3倍是多少?八、判断。

(1)小数一定比整数大。

……………………………………………………()(2)两个因数的小数位数的和是3,积的小数位数也一定是3。

…………()小数乘法练习1、用简便方法计算下面各题,并说明运用了什么运算定律。

(精华版)小数乘除法:竖式、脱式计算练习题

(精华版)小数乘除法:竖式、脱式计算练习题

(精华版)小数乘除法:竖式、脱式计算练习题小数乘法竖式计算姓名:班级得分3.5×3= 0.72×5= 2.05×4= 12.4×7=2.3×12= 6.7×0.3= 2.4×6.2= 0.56×0.04= 6.7×0.3= 0.56×0.04=3.7×4.6= 0.29×0.07= 6.5×8.4= 56×1.3= 3.2×2.5= 2.6×1.08= 0.87×7= 3.5×16= 12.5×42= 1.8×23=0.37×0.4= 1.06×25= 7×8.06= 0.6×0.39=27×0.43= 1.7×0.45= 1.2×1.4= 0.37×8.4= 0.86×1.2= 2.34×0.15= 21×2.84= 4.32×8= 6.8×25= 2.58×3= 58×1.6= 36×2.4= 2.56×3.7= 1.56×0.08= 1.03×5.3= 0.208×2.5= 1.12×1.1= 0.326×1.3= 6.5×6.5= 3.3×2.6= 0.98×5.5= 2.1×2.15= 5.2×2.9= 0.48×8.1=26.4×0.063= 0.15×0.65=3.5×3= 0.72×5= 2.05×4= 12.4×7=2.3×12= 6.7×0.3= 2.4×6.2= 0.56×0.04=6.7×0.3= 0.56×0.04= 3.7×4.6= 0.29×0.07=6.5×8.4= 56×1.3= 3.2×2.5= 2.6×1.08= 0.87×7= 3.5×16= 12.5×42= 1.8×23=0.37×0.4= 1.06×25= 7×8.06= 0.6×0.39=27×0.43= 1.7×0.45= 1.2×1.4= 0.37×8.4=0.86×1.2= 2.34×0.15= 21×2.84= 4.32×8=6.8×25= 2.58×3= 58×1.6= 36×2.4=2.56×3.7= 1.56×0.08= 1.03×5.3= 0.208×2.5=1.12×1.1= 0.326×1.3= 6.5×6.5= 3.3×2.6=0.98×5.5= 2.1×2.15= 5.2×2.9= 0.48×8.1=26.4×0.063= 0.15×0.65= 0.208×2.5= 2.6×1.8=3.5×103= 0.702×5= 3.15×4= 12.4×0.7=2.3×11.2= 6.9×0.3= 2.3×6.2= 0.58×0.09=6.7×3= 0.66×0.04= 3.7×4.6= 0.29×7=6.5×0.4= 56×1.33= 3.02×2.5= 2.6×1.8=0.8×7= 3.5×16= 12.5×4= 1.8×2.3=0.37×0.04= 1.06×25= 7×8. 6= 9.6×0.39=27×0.43= 1.7×45= 1.2×1.04= 0.37×4=86×1.2= 2.4×0.15= 21×2.4= 4.32×8=0.8×25= 2.58×3= 5.8×0.6= 3.6×0.4=2.6×3.7= 1.56×0.18= 1.03×5.03= 0.208×2=1.11×1.1= 0.36×1.3=2.5×6.5= 0.3×2.6=0.98×45= 3.2×2.5= 5.2×2.9= 0.68×8.1=计算训练(一)一、直接写出得数0.5×8= 3.6×0.4= 39.68×0= 47.6×1=4÷0.5= 12÷0.06= 12÷1.2=3÷30=0.15×7= 3.2×6+3.2×4=2.5×4×0.36=0.2+0.8×0.5= 6.03×1000= 10×0.6= 6.45×0.01=0.1×0.1= 0.24×0.5= 5.4+3.6=1.25-0.25=10.2×4.5= 2.5×6= 9×0.25=0.125×4=1.25×8×0.5= 16×0.01= 1.78÷0.3=0.27÷0.003=0.01÷0.1= 1.8×20= x-0.4x=5d-2d=3.6÷0.4= 0.6×0.8= 2.4×3=0.12×0.7=4÷5= 1.6÷0.5= 0.2÷0.05= 2.5×2.3×4=1.5÷1.5+1.5= 3.6-1.2÷2.4= 4.7×6+4×4.7=0.5×4÷0.5×4= 38.5×0×0.38= 0.6×0.8= 3×0.9=2.5×0.4=3.6×0.4 12.5×8= 50×0.04= 80×0.3= 1.1×9二、用竖式计算8.08-2.68= 5.546+29.38=17.04×0.26 =8.35×3.5=三、竖式计算(得数保留一位小数)0.43×0.29≈ 52.6×0.23≈ 4.58×0.37≈四、竖式计算(得数保留两位小数)4.3×8.14≈ 27.6×0.45≈ 27.6×0.45≈20÷12≈ 2.9×1.8≈ 5.08×0.25≈五、竖式计算(得数保留三位小数)2.5÷0.7= 2.5÷0.7=3.25×9.04=六、竖式计算(用循环小数表示商)36.8÷16≈ 10.1÷3.3≈ 15.3÷11≈0.78÷1≈七、脱式计算(2.65+2.77)÷(1.98-0.98)= 3.7×91.6+6.3×91.6=0.45×12×0.2= 6.2×2.1-2.12.8-2.8×0.15=2.8×1.43+0.57= 10-6.06+8.5=6×0.25×1.8= 144÷3.6+27.2=0.87×3.16+4.64= 6.8×0.75÷0.5=13.75÷0.125–2.75= 53+23.4÷7.2=2.881÷0.43-0.24×3.5= 28-(3.4+1.25×2.4)=(31.8+3.2×4)÷5= 31.5×4÷(6+3)=0.64×25×7.8+2.2= 2÷2.5+2.5÷2=194-64.8÷1.8×0.9= 36.72÷4.25×9.9=5180-705×6= 24÷2.4-2.5×0.8=3.416÷(0.016×35)=八、用简便方法计算下面各题5.12+2.54+4.88= 12.5×17.8×0.8= 9.9×2.5=9.4×5.8+10.6×5.8= 0.125×0.32×0.25= 9.6+9.6×99=2.8×7.6+1.4×2.8 +2.8= 6.3×10.1= 0.25×3.2×12.5=12.5×9.7?12.5×8.7= 3.7×91.6+6.3×91.6=16.84÷40÷0.25= 12.5×0.4×2.5×8= 9.5×101=4.2×7.8+2.2×4.2= 2.55×7.1+2.45×7.1=九、解方程4(x+0.3)=4.8 1.2x-0.8x=9.6 20+x=367x-55=59 0.7x=4.2 (10-7.5)x=1X×1.8=0.972 0.06×X=1.02 X÷0.13=0.712.4÷X=31十、列式计算(1)一个数的25倍是37.75,这个数是多少?(2)比47.88与3.8的商大42.5的数是多少?(3)1.25乘4.2减5,差是多少?(4)比4.7的1.5倍多3.05的数是多少?(5)一个数的25倍是37.5,这个数是多少?(6)比47.88与3.8的商大42.5的数是多少?(7)60比一个数的3倍少30,这个数是多少?(8)一个数的4倍比60多24,这个数是多少?(9)用14.81与5.19的和,乘以它们的差,积是多少?(10)126.8与15.7的和,乘以1.02,积是多少?(11)0.6乘0.8的积加上0.12后,再除以1.2,商是多少?十一、应用题(1)工程队开凿一条长0.7千米的隧道,原来每天开凿0.024千米,开凿了15天。

小数乘法简便脱式计算练习题

小数乘法简便脱式计算练习题

小数乘法简便脱式计算练习题7.28×99+7.284.3×50×0.64-2.64×0.×0.283.94+34.3×0.28.9×1.1×4.732+4.9-0.94.8×100.112.5×0.4×2.5×82.7×5.4×3.6.58×4.5×0.9×810.8-0.8×7.0 0.87×3.16+4.641.2×÷4.8.6×9.85-5.466.5×99+56.54.8+ 0.3÷ 1.0.6÷× 1.258.05×3.4+7.6.8×0.5+1.584.8-4.8×0..5×10117.-.×..09×8.×40.÷ 0.81 × 0.184.× .13.×0.×826.81+6.81×99 0.25×185×40.4×0.8-3.4×0. ×..2.×1.25+4.2×1.752.37×6.3+2.37×3.70.25×39+0.25×1.256.8×0.75÷0.513.5×0.982.5×1.25×0.3 0.125×7299.75÷0.125–2.7 12.5×8..8×10.1×0.33+54×0.30.25×185×407.2.5×.69×1013.8×10.1 .5×9.81+6.81× 1.53+23.4÷小数乘法分类练习口算练习一A25×4= 0.4×2.5= 125×8= 0.8×12.5=0×0.02=15×0.3= 0.32×0.3= 0.2×0.5=3.6×0.= 0.4×0.25=0.5×0.=3.6×0.5= 0.38×0.5=1.2×0.5= 0.16×6=2.3×0.=0.6×0.5=B0.02×14=0.4×8=.5×6=.2×1=0.5×10=3.2×4=.19×20=.8×100=0.08×3=0.9×100=3.5×10=×0.02= 0.4×5= .2×2= 0.08×5=5.19×100= .18×10=C3.9×20=0.11×8= .6×0.3= 15.5×3=8.8×0.1=2.5×0.4= 1.25×4= 0.36×10=.8×4=9.6×0=0.19×100= 0.25×40= 0.125×80=20.3×4=1.8×0.5=0.16×5= 10.9×0.5=口算练习二默认分类010-09-261:14:11 阅读21 评论0字号:大中小订阅A3.6×20= 0×0.05= 0.5×0.4=.4×4+5.6×4=70×0.04=.7×0.01= 1.25×2×0.4=1.25×4=0.09×5= .5×0.2= .2×0=0.5×0.02=40×0.8= 1.5×0.6=1.12×100= +0.3×0.5=0.04×25=B3×0.2×0.5= 1.25×0.8=×3.7×0.25= .6×0.1=0.18×0.3= .6×5=0.05×0.8=+0.17×0.1=1×0.02= 1.2×0.5=0.4×1.5×10=0.62×0.2=7×0.5= .6×0.2×1=.3×101=5×8×125×4=0.9×6=C0.1×0.01=0.7×6–6×0.3=0.2×0.9=1.7×25×4=1.4×0.2=0.5×2.5=1.8×6–1.8= 1.7×3=0.32×0.2×5=7×0.08=10–0.8×10= 1.6×5=0.37×20=.8×9+2.8=5.6×1.01=3.06×0.2=12×2.5=口算练习三默认分类010-09-261:19:5阅读3评论0字号:大中小订阅A3.2÷1.6=.4÷10=0.96÷0.06= 0.1÷0.01=6÷0.03=9.6÷1.6=0.49÷0.7=5.2÷1.3=77÷7.7=0÷4.8=.1÷7=.8÷2.2=1.8÷0.9=8= ÷5.7=0.72÷5.78.5÷5=.4÷4.2=1÷4=0.81÷0.9= .2÷0.01=0.36÷1.8= 0.56÷0.7=2.8÷0.8=0.84÷0.6= 16÷1.6=19.6÷2=0.36÷3= 1.6÷0.04= 1.2÷0.3=3.6÷0.1=C0.45÷0.15=0.24÷0.3=3.2÷100=0.45÷0.9=0.51÷17=0.84÷6=0.5÷0.1= .8÷7=1.9÷0.19= .5÷1.7=7.5×4= 0.04×25=5×0.4=1.2×0.5=0×0.9=口算练习四默认分类010-09-261:25:01 阅读3评论0字号:大中小订阅A4.5×0.1=.5×0.5= 0.15÷0.5=4.2÷0.1=12÷0.3=2.87÷0.7= 1.6×0.05=.5×0.04= 1.5×8=0.8×0.08=0.2×0.5=0.13×0.4=0.5×0.6=1.4×0.6= ÷0.14=B2.1×3÷2.1=÷0.5= 0.3÷10=8.6÷1000=1.7×0.25×4=4.5×0.2=0.24÷0.6= 0.9×0.6= 0.1×0.1 =÷2.5=2.8÷0.04=0.6×1.2= 100÷0.01=0.72÷0.3=3.6÷0.1C2.5×20=7÷0.5= ÷0.8=.7÷0.29=.2÷0.3=0.72÷0.12=0.9÷0.01=7×5.3÷5.3=.6×0.2×1=45÷0.5÷2=0.96÷0.3=0.45÷0.09= 0.35÷0.7=64.32÷16=7÷0.01 笔算练习二默认分类010-09-261:41:21 阅读9评论0字号:大中小订阅A1.73×12.5×0.82.8×3.5-3.5+9.2×3.536.4+68.8-7.351.25×6.412.5×0.32×0.9.5×0.02×0.8×1.255.5×1.5×0.12.07×8.6+9.125B23.13+25×0.16+1.87[-0.8]×0.40.8××512.5×0.32×0.2510.64+7.65×2.4+11.718.+.1 + 1.+.925.6-9.94.5×25×4×2C9.5×3+7×9.4.02-3.5+0.985.7+0.3-5.7+0.1.7-1.8-3.23.8×9.9+3.83.5×37+6.5×371.65×2.3+6.7×1.688×1.25D12.5×4.80.25×3.2×42.5×7.5+2.5×2.63×10.13.25-0.84-1.16.41×10.12.63×9..61×9+7.61E0.25×4888×1.2522.7×1.25×0.0.55×991.5×1.3×2.7+3.1+2.9+3.225-4.9-6.13.5×4.8+2.2×2.4F131+132+130+129.5×0.02×0.8×1.255.5×1.5×0.12.07×8.6+9.1256.41×10.12.63×9.92、用竖式计算0.396÷1.2= 0.756÷0.36= 15.6×13=0.18×15= 0.025×14=3.06×36= 0.04×0.12=3.84×2.6≈ .76×3=7.15×20.75÷3..68×0.216.9÷0.1313.76×0.8=5.2×0.6.4×1..4×0.535.4×4.20.042×0.540.76×0.30.25×0.0460.12×0.5×0.16=.8×0.25=0.125×1.4≈1.55÷3.94.48×0.42.52×3.42.5÷0.7= .7×0.0165.25×1.08×保留三位小数)10.75÷12.5=.25×9.04=3、脱式计算2.5×7.1×16.12×99+16.12.2×0.9+0.9.28×99+7.2.3×50×0.264-2.64×0.53.94+34.3×0.28.9×1.1×4.74.8-4.8×0.54.8×100.126×15.7+15.7×242.7×5.4×3.96.58×4.5×0.9+ 4.9-0.910.8-0.8×7.09×0.1.2×÷4..6×9.85-5.4.05×3.4+7.62.8×0.5+1.5 -0.125)×86.5×99+56..8+ 0.3÷1.12.5×0.4×2.5×8×..5×1.25×0.3.5×.8×10.10.2 5×39+0.25×1.26.81+6.81×99.75÷0.125–2.751.53+23.4÷7.12.5×8.84. 2.×1.25+ 4.2×1.7.69×1010.125×7 0.25×185×40.5×994.4×一.判断题 1个数除以小数,商一定被除数大。

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