五年级上册简便运算专项训练题(二)
小学数学五年级上册简便计算68道题(含答案)
小学数学五年级上册简便计算68道题(含详细答案)3.29+0.73+2.27 3.29-0.73-2.27 7.5+2.5-7.5+2.57.325-3.29-3.325 7.325-(5.325+1.7) 7.325-(5.325-1.7) 3.29+0.73-2.29+2.27 3.29×0.25×40.125×8.80.25×0.280.125×3.2×2.535×10.2 0.25×4÷0.2 5×43.5×9.9 3.5×99+3.53.5×101-3.5 3.5×9.9+3.5×0.1 3.5×2.7+35×0.733.5×2.7-3.5×0.7(32+5.6)÷0.8 3.5÷0.6-0.5÷0.64.9÷1.4 7÷0.25÷47÷0.1257.35÷(7.35×0.25)7.35÷(7.35÷0.25)3.07-0.38-1.62 1.29+3.7+2.71+6.38-2.45-1.55 3.25+1.79-0.59+1.7523.4-0.8-13.4-7.2 0.32×4033.2+0.36+4.8+ 1.64 1.23+ 3.4-0.23+6.6 0.25×3612.7-(3.7+0.84) 36.54-1.76-4.54 0.25×0.73×47.6×0.8+0.2×7.60.85×1990.25×8.5×41.28×8.6+0.72×8.612.5×0.96×0.8 10.4-9.6×0.350.8×(4.3×1.25) 3.12+3.12×9928.6×101-28.6(4.23+6.17)×0.80.86×15.7-0.86×14.7 2.4×10214-7.32-2.68 2.64+8.67+7.36+11.33 2.31×1.2×0.5(2.5-0.25)×0.4 9.16×1.5-0.5×9.163.6-3.6×0.54.5÷1.8 930÷0.6÷5 63.4÷2.5÷0.4 4.25÷2.5×9.9+0.173.9÷(1.3×5)(7.7+1.54)÷0.72.5×2.4 2.7÷450.35×1.25×2×0.8 32.4×0.9+0.1×32.415÷0.25 15÷(0.15×0.4)小学数学五年级上册简便计算练习(答案卷)一、归类练习:3.29+0.73+2.27 3.29-0.73-2.27 7.5+2.5-7.5+2.5=3.29+(0.73+2.27) =3.29-(0.73+2.27) =(7.5-7.5)+(2.5+2.5)=3.29+3 =3.29-3 =0+5=6.29 =0.29 =5(加法结合律)(减法的性质)(同级运算交换)7.325-3.29-3.325 7.325-(5.325+1.7) 7.325-(5.325-1.7)=7.325-3.325-3.29 =7.325-5.325-1.7 =7.325-5.325+1.7=4-3.29 =2-1.7 =2+1.7=0.71 =0.3 =3.7(减法交换)(减法的性质)(前面减号,脱括号变符号)3.29+0.73-2.29+2.27 3.29×0.25×4 0.125×8.8=(3.29-2.29)+(0.73+2.27) =3.29×(0.25×4) =0.125×8×1.1=1+3 =3.29×1 =1×1.1=4 =3.29 =1.1(同级运算交换)(乘法结合律)(先拆数,乘法结合律)0.25×0.28 0.125×3.2×2.5 35×10.2=0.25×4×0.07 =(0.125×8)×(0.4×2.5) =35×(10+0.2)=1×0.07 =1×1 =35×10+35×0.2=0.07 =1 =350+7(先拆数,乘法结合律)(拆数,乘法结合律) =357(拆数,乘法分配律)0.25×4÷0.25×4 3.5×9.9 3.5×99+3.5=(0.25÷0.25)×(4×4) =3.5×(10-0.1) =3.5×(99+1)=1×16 =3.5×10-3.5×0.1 =3.5×100=16 =35-0.35 =350(同级运算交换) =34.65 (乘法分配律)(拆数,乘法分配律)3.5×101-3.5 3.5×9.9+3.5×0.1 ★ 3.5×2.7+35×0.73=3.5×(101-1) =3.5×(9.9+0.1) =3.5×2.7+3.5×7.3=3.5×100 =3.5×10 =3.5×(2.7+7.3)=350 =35 =3.5×10(乘法分配律)(乘法分配律) =35(先利用积不变的规律转化,然后再用乘法分配律)3.5×2.7-3.5×0.7 ★ (32+5.6)÷0.8 ★ 3.5÷0.6-0.5÷0.6=3.5×(2.7-0.7) =32÷0.8+5.6÷0.8 =(3.5-0.5)÷0.6=3.5×2 =40+7 =3÷0.6=7 =47 =5(乘法分配律)(后2题类似分配律,但只适用于(a+b)÷c和(a-b)÷c,而a÷(b+c)和a÷(b-c)不能用。
人教版数学五年级上册《简便运算》专项训练卷(含答案解析)
试卷第1页,共16页绝密★启用前人教版数学五年级上册《简便运算》专项训练卷(含答案解析)xxx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第I 卷(选择题)请点击修改第I 卷的文字说明第II 卷(非选择题)请点击修改第II 卷的文字说明一、脱式计算1.简便计算。
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【答案】8.5;9.6;0.73;436;16.2;100【分析】(1)(2)(3)运用乘法交换律进行计算即可。
(4)运用乘法结合律进行计算即可。
(5)运用乘法交换律进行计算即可。
(6)把32拆成8×4,然后运用乘法交换律和乘法结合律进行计算即可。
【详解】0.25×8.5×4=0.25×4×8.5=1×8.5=8.512.5×0.96×0.8=12.5×0.8×0.96=10×0.96=9.60.25×0.73×4=0.25×4×0.73=1×0.73=0.734.36×12.5×8=4.36×(12.5×8)=4.36×100=4360.25×16.2×4=0.25×4×16.2=1×16.2=16.21.25×2.5×32=(1.25×8)×(2.5×4)=10×10=1002.简便计算。
3.2×0.25×12.50.25×36(1.25-0.125)×8 4.8×10.13.6×1020.39×199【答案】10;9;9;48.48;367.2;77.61【分析】(1)把3.2分成0.4×8,再运用乘法交换律和结合律简算;(2)把36分成4×9,再运用乘法,结合律简算;(3)运用乘法分配律进行简算;(4)把10分成(10+0.1),再运用乘法分配律进行简算;(5)把102分成(100+2),再运用乘法分配律进行简算;(6)199变为(200-1),再运用乘法分配律进行简算。
五年级简便运算300题及答案
五年级简便运算300题及答案五年级上数学计算题大全300道五年级数学题上册竖式计算(一)2.5×103= 0.702×15=3.15×0.14= 12.4×0.17=2.3×11.2=0.416÷32= 6.6÷4= 43.5÷29= 28.6÷11= 20.4÷24=3.9×0.3=4.3×6.2= 3.64÷52= 15.6÷12= 328÷16=竖式计算(二)2.19÷0.3= 5.58÷3.1= 8.32÷4= 5.92÷1.6= 0.63÷0.15= 6.7×0.3= 0.68×0.04= 3.9×5.6= 0.285×7= 58×0.009= 6.15×0.4= 56×1.33= 140.4÷18= 9.18÷9= 243.2÷6.4=竖式计算(三)3.5×1.6= 12.5×40= 1.3×2.3= 3.02×2.05= 2.6×1.8=7÷0.28= 15.6÷2= 0.138÷0.15= 216÷2.7= 6.4÷32=1.37×0.04= 1.06×2.05= 104÷0.52= 72÷3.8= 75.6÷1.8=竖式计算(四)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≈ 5.76×3= 7.15×22=90.75÷3.3 3.68×0.25= 16.9÷0.13= 1.55÷3.9=3.7×0.016=简便计算(一)66.86-8.66-1.34 0.25×16.2×4 0.25×16.2×4 4.8×7.8+78×0.523.6×1024.8×100.1 56.5×9.9+56.5 7.09×10.8-0.8×7.094.2÷3.5 320÷1.25÷8 18.76×9.9+18.76 3.52÷2.5÷0.4简便计算(二)1.25×2.5×32 0.49÷1.43.65×10.1 15.2÷0.25÷415.6×13.1-15.6-15.6×2.1 4.2×99+4.2 0.89×100.1 17.8÷(1.78×4)(45.9-32.7)÷8÷0.125 9.7×99+9.7 4.36×12.5×85.6÷3.5简便计算(三)0.65×101 27.5×3.7-7.5×3.7 8.54÷2.5÷0.43.83×4.56+3.83×5.4445×(267+143) 2.5×0.39×0.4 (25+2.5+0.25)×41.8×3.5+2.5×1.812.5×8.8 3.6×1.2÷3.6×1.2 1.31×12.5×8×23.8×0.99简便计算(四)4.6×99+4.6 7.5×101-7.5 1.25×2.5×(80×4)4.6×47+4.6×54-4.67.68÷2.5÷0.4 0.45×72+45×0.18+4.5 5.5×99 0.125×7212.5×0.4×2.5×8 9.5×101 4.2×7.8+2.2×4.20.87×3.36+4.64×0.87解方程(一)20X-50=50 28+6X=88 32-22X=10 3X+5X=483X-24-=3 1.8x=0.972 X+3=18 X-6=1214X-8X=12 12X-8X=4.8 7.5×2X=15 4(X-5.6)=1.6解方程(二)7x =49 20x=40 8x=8 1.2x=81.6x+3=18 x+32=76 100+x=310 x+55=129x-54.3=100 x-77=275 x-58=144 11.6-x=8x÷2.5=100 x÷3=33.3 x÷2.2=8 6÷x=12解方程(三)0.273÷x=0.35 1.8x=0.972 5x+34=54 2(x+x+0.5)=9.85(x+3)=35 x+3.7x+2=16.1 3x-1.2x=158 2x+55=1293×(x-4)=46 (8+x)÷5=15 (x+5) ÷3=16 6×5+2x=44解方程(四)20X-50=50 28+6X=88 32-22X=10 56-2X=204X+2=6 3X+6=18 16+8X=40 2X-8=84X-3×9=29 7(X-2)=49 4×8+2X=36 48-27+5X=31数学五年级上计算训练(一)1、直接写出得数。
五年级数学上册专项提升第一单元专练篇12:小数乘法混合运算和简便计算其二(原卷版+解析)
第一单元专练篇·12:小数乘法混合运算和简便计算其二1.计算下面各题,能简算的要简算。
22×2.5 5.5×13.3+6.7×5.53.16-3.16×0.7524.5×0.125×0.82.计算下面各题,能简算的要简算。
86.1×101 1.25×3.2×2.54.8×99+4.80.125×500×0.2×83.计算下面各题,能简算的要简算。
49.2-0.5×0.5-8.75(30-19.8)×0.6+31.26.4×1.2511.56×15.7-1.56×15.72.5×(0.78×40)28.8×9.96.4×1029.18×7.5+91.8×0.255.计算下面各题,能简算的要简算。
12.5×3.2×2.5 4.5+5.5×1.23.16×101-3.160.25×4.7-0.7×0.256.计算下面各题,能简算的要简算。
7.4×9.90.16×0.25×0.125 2.5×167-25×0.7 5.85+0.45×3.221.3×99+21.3 1.25×32101×7.2 2.5×3.7+63×0.258.计算下面各题,能简算的要简算。
0.59×989.9×9.9+0.998.88×1.2512.5×0.96×0.89.计算下面各题,怎样简便就怎样算。
1.3×11.6-1.6×1.3 3.5×9.9+3.5×0.1 7.6×0.8+0.2×7.69.16×1.5-0.5×9.166.8×2.7+2.7×3.20.5×2.33×80.38×102 4 .8×0.27+0.52×2.711.计算下面各题,能简算的要简算。
小学数学五年级上册简便计算68道题(含答案)
小学数学五年级上册简便计算68道题(含详细答案)3.29+0.73+2.27 3.29-0.73-2.27 7.5+2.5-7.5+2.57.325-3.29-3.325 7.325-(5.325+1.7) 7.325-(5.325-1.7)3.29+0.73-2.29+2.27 3.29×0.25×4 0.125×8.83.2×2.5 35×10.2 0.25×4÷0.25×4 0.25×0.28 0.125×3.5×9.9 3.5×99+3.53.5×101-3.5 3.5×9.9+3.5×0.1 3.5×2.7+35×0.733.5×2.7-3.5×0.7 (32+5.6)÷0.8 3.5÷0.6-0.5÷0.64.9÷1.4 7÷0.25÷4 7÷0.1257.35÷(7.35×0.25) 7.35÷(7.35÷0.25)3.07-0.38-1.62 1.29+3.7+2.71+6.38-2.45-1.55 3.25+1.79-0.59+1.7523.4-0.8-13.4-7.2 0.32×4033.2+0.36+4.8+1.64 1.23+3.4-0.23+6.6 0.25×3612.7-(3.7+0.84)36.54-1.76-4.54 0.25×0.73×47.6×0.8+0.2×7.6 0.85×199 0.25×8.5×40.96×0.8 10.4-9.6×0.351.28×8.6+0.72×8.6 12.5×0.8×(4.3×1.25) 3.12+3.12×99 28.6×101-28.6(4.23+6.17)×0.8 0.86×15.7-0.86×14.7 2.4×10214-7.32-2.68 2.64+8.67+7.36+11.33 2.31×1.2×0.5 (2.5-0.25)×0.4 9.16×1.5-0.5×9.163.6-3.6×0.54.5÷1.8 930÷0.6÷563.4÷2.5÷0.4 4.25÷2.5×9.9+0.173.9÷(1.3×5)(7.7+1.54)÷0.72.5×2.4 2.7÷450.35×1.25×2×0.8 32.4×0.9+0.1×32.415÷0.25 15÷(0.15×0.4)小学数学五年级上册简便计算练习(答案卷)一、归类练习:3.29+0.73+2.27 3.29-0.73-2.27 7.5+2.5-7.5+2.5=3.29+(0.73+2.27)=3.29-(0.73+2.27) =(7.5-7.5)+(2.5+2.5)=3.29+3 =3.29-3 =0+5=6.29 =0.29 =5(加法结合律)(减法的性质)(同级运算交换)7.325-3.29-3.325 7.325-(5.325+1.7) 7.325-(5.325-1.7)=7.325-3.325-3.29 =7.325-5.325-1.7 =7.325-5.325+1.7=4-3.29 =2-1.7 =2+1.7=0.71 =0.3 =3.7(减法交换)(减法的性质)(前面减号,脱括号变符号)3.29+0.73-2.29+2.27 3.29×0.25×4 0.125×8.8=(3.29-2.29)+(0.73+2.27) =3.29×(0.25×4)=0.125×8×1.1=1+3 =3.29×1 =1×1.1=4 =3.29 =1.1(同级运算交换)(乘法结合律)(先拆数,乘法结合律)0.25×0.28 0.125×3.2×2.5 35×10.2=0.25×4×0.07 =(0.125×8)×(0.4×2.5)=35×(10+0.2)=1×0.07 =1×1 =35×10+35×0.2=0.07 =1 =350+7(先拆数,乘法结合律)(拆数,乘法结合律) =357(拆数,乘法分配律)0.25×4÷0.25×4 3.5×9.9 3.5×99+3.5=(0.25÷0.25)×(4×4)=3.5×(10-0.1)=3.5×(99+1)=1×16 =3.5×10-3.5×0.1 =3.5×100=16 =35-0.35 =350(同级运算交换) =34.65 (乘法分配律)(拆数,乘法分配律)3.5×101-3.5 3.5×9.9+3.5×0.1 ★ 3.5×2.7+35×0.73=3.5×(101-1) =3.5×(9.9+0.1)=3.5×2.7+3.5×7.3=3.5×100 =3.5×10 =3.5×(2.7+7.3)=350 =35 =3.5×10(乘法分配律)(乘法分配律) =35(先利用积不变的规律转化,然后再用乘法分配律)3.5×2.7-3.5×0.7 ★ (32+5.6)÷0.8 ★ 3.5÷0.6-0.5÷0.6=3.5×(2.7-0.7) =32÷0.8+5.6÷0.8 =(3.5-0.5)÷0.6=3.5×2 =40+7 =3÷0.6=7 =47 =5(乘法分配律)(后2题类似分配律,但只适用于(a+b)÷c和(a-b)÷c,而a÷(b+c)和a÷(b-c)不能用。
新人教版五年级上册小数简便计算练习题六套题
小数简便计算练习一(一)小数加减法计算3.2+0.36+4.8+1.64 0.456+6.22+3.78 6.9+4.8+3.1 1.29+3.7+2.71+6.30.398+0.36+3.64 4.02+5.4+0.98 73.8-1.64-13.8-5.36 7.14-0.53-2.47 5.17-1.8-3.2 35.6-1.8-15.6-7.2 66.86-8.66-1.34 36.8-3.9-6.17.85+2.34-0.85+4.66 13.35-4.68+2.65 9.6+4.8-3.65.27+2.86-0.66+1.63 3.68+7.56-2.68 47.8-7.45+8.8(二)小数乘除法计算0.25×16.2×4 320÷1.25÷8 3.9÷(1.3×5)3.52÷2.5÷0.4 9.6÷0.8÷0.4 2.5×2.43.2×0.25×12.5 15÷(0.15×0.4) 2.7÷458.54÷2.5÷0.4 0.25×0.73×4 4.6÷3.5(一)小数加减法计算3.82+2.9+0.18+9.1 1.27+3.9+0.73+16.1 1.57+0.245+7.432.64+8.67+7.36+11.33 0.134+2.66+0.866 1.76+0.195+3.24 23.4-0.8-13.4-7.2 15.02-6.8-1.02 8-2.45-1.553.25+1.79-0.59+1.75 1.23+3.4-0.23+6.6 7.5+4.9-6.5 13.75-(3.75+6.48) 15.89+(6.75-5.89) 12.7-(3.7+0.84)(二)小数乘除法计算0.8×(4.3×1.25) 4.36×12.5×8 0.25×0.73×4 320÷1.25÷8 17.8÷(1.78×4) 4.5÷1.8 12.5×0.96×0.8 1.25×2.5×32 4.9÷1.4 0.35×(1.25×2)×0.8 63.4÷2.5÷0.4 0.25×36(一)小数加减法计算2.35+1.713+0.287+7.65 4.8+8.63+5.2+0.37 5.93+0.19+2.81 67.34+21.56+2.66+8.44 0.74+19.16+9.26+0.82 6.02+3.6+1.9815.75+3.59-0.59+14.25 3.9-4.1+6.1-5.9 14-7.32-2.6825.48-(9.4-0.52) 9.43-(6.28-1.57) 146.5-(23+46.5) 36.54-1.76-4.54 3.07-0.38-1.62 32+4.9-0.9(二)小数乘除法计算3.2×0.25×12.5 12.5×0.96×0.84.2÷3.515.2÷0.25÷4 1.25×2.5×32 0.49÷1.418-1.8÷0.125÷0.8 930÷0.6÷5 70÷282.31×1.6×0.5×1.25 0.25×8.5×4 15÷0.255.6÷1.25÷0.8÷2.5÷0.4 0.125×16.2×167.09×10.8-0.8×7.09 3.72×3.5+6.28×3.5 27.5×3.7-7.5×3.7 3.83×4.56+3.83×5.44 3.9×2.7+3.9×7.3 7.6×0.8+0.2×7.6乘法分配律的运用二3.14×0.68+31.4×0.032 32.4×0.09+0.1×3.24 1.28×8.6+7.2×86 2.3×16+2.3×22+23×0.2 9.16×15-0.5×91.6 101×0.87-0.91×87乘法分配律的运用三28.6×101-28. 6 1.87×9.9+0.187 58.5×81-8.5 (45.9-32.7)÷8÷0.125 (1.25-0.125)×8 (2.5-0.25)×0.4乘法分配律的运用四0.8×100.1 0.79×199 0.85×1993.65×10.14.6×102 0.65×1017.74×(2.8-1.3)+1.5×2.26 46×57+23×869.16×2.53-0.053×91. 6-9.16小数简便计算练习五小数简便计算的方法:(整数的运算定律在小数中同样适用)○1乘法交换律与结合律、分配律的运用。
期中常考易错题简便计算专项练习(试题)-五年级上册数学人教版
五年级上册数学期中常考易错题简便计算专项练习1.计算下面各题,怎样简便就怎样算。
[75-(12+18)]÷15 (6.8-6.8×0.55)÷8.5216+305÷5 5+25×442.计算下面各题,怎样简便就怎样算。
1.7×4.7+4.7+4.3×4.7 98.5-14.82÷7.6×3.20.175÷0.25×4 35×8+35×6-4×353.计算下面各题,怎样简便就怎样算。
⨯⨯÷÷0.125 3.20.25210.250.4÷-93.70.3293.70.68⨯+⨯13.750.125 2.754.计算下面各题,怎样简便就怎样算。
0.0695×2500+695×0.24+51×6.95 15.3+4.72+4.7+5.2 4.05÷1.5÷0.03 1.92÷0.12-2.75.计算下面各题,怎样简便就怎样算。
÷⨯+⨯+⨯150.257.2567.8757250.787572500.053375⨯-⨯⨯-0.8615.70.8614.728.610128.66.计算下面各题,怎样简便就怎样算。
20.9+10.5÷(5-3.5) 3.6×2.5+7.5×3.64.58+3.38+6.62 0.25×0.125×4×87.计算下面各题,能简便计算的要简算。
130.4 2.5÷÷14.64 3.7 2.8+⨯64 4.536 4.5⨯+⨯1.252.53.2⨯⨯ ()13.520.84.5÷-⨯⎡⎤⎣⎦ 9.9 4.7⨯8.计算下面各题,能简便计算的要简便计算。
1.25 4.68⨯⨯ 1.599⨯ ()12.712.75÷⨯56 1.25⨯ 71.80.254÷÷ 1.6 3.50.8⨯÷9.计算下面各题,怎样简便就怎样算。
小学数学五年级上册简便计算68道题(含详细规范标准答案)
小学数学五年级上册简便计算68道题(含详细规范标准答案)一、加减法简便计算1. 123 + 456 = 5792. 789 321 = 4683. 678 + 123 456 = 3454. 456 + 789 123 = 11225. 987 + 654 321 = 13206. 789 + 456 123 = 11227. 654 + 321 987 = 3128. 321 + 987 654 = 6549. 123 + 456 + 789 = 136810. 456 + 789 + 123 = 1368二、乘除法简便计算11. 7 × 8 = 5612. 9 ÷ 3 = 313. 12 × 13 = 15614. 15 ÷ 5 = 315. 18 × 19 = 34216. 21 ÷ 7 = 317. 24 × 25 = 60018. 27 ÷ 9 = 319. 30 × 31 = 93020. 33 ÷ 11 = 3三、混合运算简便计算21. 12 + 7 × 8 = 6822. 9 ÷ 3 + 6 = 723. 12 × 13 45 = 14124. 15 ÷ 5 + 8 = 725. 18 × 19 + 21 = 35726. 21 ÷ 7 4 = 127. 24 × 25 12 = 58828. 27 ÷ 9 + 3 = 629. 30 × 31 15 = 91530. 33 ÷ 11 2 = 1四、分数简便计算31. 1/2 + 1/3 = 5/632. 2/3 ÷ 1/4 = 8/333. 3/4 + 1/2 = 5/434. 4/5 ÷ 1/2 = 8/535. 5/6 + 1/3 = 7/636. 6/7 ÷ 1/4 = 24/737. 7/8 + 1/2 = 11/838. 8/9 ÷ 1/3 = 839. 9/10 + 1/5 = 13/1040. 10/11 ÷ 1/2 = 20/11五、小数简便计算41. 0.5 + 0.3 = 0.842. 0.6 ÷ 0.2 = 343. 0.7 × 0.8 = 0.5644. 0.4 ÷ 0.4 = 145. 0.9 + 0.1 = 146. 0.8 ÷ 0.2 = 447. 0.7 × 0.9 = 0.6348. 0.6 ÷ 0.3 = 249. 0.5 + 0.2 = 0.750. 0.4 ÷ 0.2 = 2六、百分数简便计算51. 20% + 30% = 50%52. 40% ÷ 20% = 253. 50% × 80% = 40%54. 25% + 75% = 100%55. 60% ÷ 30% = 256. 70% × 50% = 35%57. 80% + 20% = 100%58. 90% ÷ 10% = 959. 55% × 45% = 24.75%60. 65% + 35% = 100%七、方程简便计算61. 2x + 3 = 7,解得 x = 262. 3x 4 = 5,解得 x = 363. 4x + 5 = 9,解得 x = 164. 5x 6 = 4,解得 x = 265. 6x + 7 = 13,解得 x = 166. 7x 8 = 9,解得 x = 367. 8x + 9 = 17,解得 x = 168. 9x 10 = 11,解得 x = 3八、应用题简便计算69. 小华有10个苹果,小明有15个苹果,他们一共有多少个苹果?解:10 + 15 = 25个苹果。
五年级数学上册简便计算专项练习
五上简便计算专项练习第一部分:乘法结合律和乘法分配律的回顾分配律的模型:(a+b)×c=a×c+b×c一、分配律的典型例题①由(a±b)×c推出a×c±b×c的典型例题有三种:●(125+40)×8因为题中125×8和40×8在计算时都非常简便,用口算的方式即可得出结果,因此这道题在计算时可直接套用公式进行计算。
即(125+40)×8=125×8+40×8=1000+320=1320●103×12此题中有一个接近整百的数(这种类型的题目还有接近整十或整千的),可以把103拆分成整百数加一个较小数,即:100+3,则题目变成:(100+3)×12,可套用公式变成:103×12=(100+3)×12=100×12+3×12=1200+36=123698×47,可以把98拆成整百数减一个较小的数。
即:100-2,则题目变成:47×(100-2),可以套用公式变成:98×47=47×(100-2)=47×100-47×2=4700-94=4606●(18+4)×25这道题虽然已经是分配律(a+b)×c的形式,但是实际计算过程中18×25并不简单,因此不能直接拆分成18×25+4×25的样子,而是先把18+4算出来等于22,然后对22进行重组,拆分成上题的整十数加较小数的样子:20+2,因此题目的解法是:(18+4)×25=22×25=(20+2)×25=20×25+2×25=500+50=550②由a×c+b×c推出(a+b)×c的典型题例有两种:●24×31+76×31这题因为24+76正好等于100,因此可直接套用公式变为:24×31+76×31=(24+76)×31=100×31=3100●49+49×99,此题用乘法的意义解释就是1个49加上99个49,49就是1×49,把它变为模型为1×49+49×99,解题方法为49+49×99=1×49+49×99=(1+99)×49=100×49=4900乘法分配律的简便运算基本分为这五种,您可根据典型例题的特点有针对性的指导孩子。
人教版五年级上册英语简便运算专项训练题 完整
人教版五年级上册英语简便运算专项训练题完整介绍本文档包含了人教版五年级上册英语的简便运算专项训练题。
这些练题旨在帮助学生提高他们在英语方面的运算能力。
练题列表1. 选择正确的单词填空:- ____(1)____ you have a pen? No, I ____(2)____.- Do you have ____(3)____? Yes, I do.- How many ____(4)____ do you have? I have three.- She ____(5)____ two dolls and a teddy bear.2. 选择合适的句子补全对话:- A: What ____(1)____ is it today? B: It's Monday.- A: What's the ____(2)____ today? B: It's the 10th of August.- A: What's the ____(3)____ today? B: It's sunny.3. 连线题:将正确的英语单词与对应的中文词语连线:- Cat 狗- Dog 猫- Rabbit 兔子- Bird 鸟- Elephant 大象4. 根据图片选择正确的单词填空:- A: How many ____(1)____ do you see in the picture? B: I see two.5. 阅读理解题:- Read the passage and answer the questions:Lily has a pet cat. Its name is Kitty. Kitty is two years old. It's white and grey. Kitty is very playful. Lily loves her cat very much.Questions:- What is Lily's pet cat's name?- How old is Kitty?- What color is Kitty?总结以上是人教版五年级上册英语简便运算专项训练题的完整列表。
五年级上册简便运算练习题及答案
五年级上册简便运算练习题及答案五年级上册简便运算练习题及答案请用简便方法计算下列各题0.25×0.20.125×3.2×2.535×40.20.25×4÷0.25×4.5×9.93.5×99+3.53.5×101-3.53.53.5×2.7-3.5×0.74.9÷3.57.35÷.353.29+0.73+2.273.29-0.73-2.2.5+2.5-7.5+2.57.325-3.29-3.32.325-7.325-×9.9+3.5×0.1.5÷0..5÷0.25÷÷7.325-×2.7+35×0.7÷0.6-0.5÷0.÷0.12÷83.29+0.73-2.29+2.23.29×0.25×0.125×8.863.4÷2.5÷0..9÷1.4.9÷÷0.70.35×1.25×2×0.828.6×101-28.614-7.32-2.62.64×0.47.6×0.8+0.2×7.60.25×362.5×2.432.4×0.9+0.1×32.40.86×15.7-0.86×14.7+8.67+7.36+11.39.16×1.5-0.5×9.163.60.85×19 ×3.2×2.552.7÷4515÷0.252.4×102.31×1.2×0.5-3.6×0.0.25×8.5×4×40.20.125五年级数学简便计算练习卷四7.6×0.8+0.2×7.60.85×190.25×8.5×41.28×8.6+0.72×8. 12.5×0.96×0.810.4-9.6×0.350.8×3.12+3.12×9928.6×101-28.60.86×15.7-0.86×14..4×102.31×1.2×0.514-7.32-2.62.64+8.67+7.36+11.30÷28×0.49.16×1.5-0.5×9.163.6-3.6×0.54.5÷1..2÷3.30÷0.6÷563.4÷2.5÷0.4.9÷1.4.9÷÷0.72.5×2..7÷15÷0.35×1.25×2×0.82.4×0.9+0.1×32. 15÷0.25五年级数学简便计算练习卷三46×57+23×813.7×0.25-3.7÷.22×9.9+6.66×6.7101×0.87-0.91×810.7×16.1-15.1×10.70.79×1994.8+8.63+5.2+0.5.93+0.19+2.81 1.76+0.195+3.242.35+1.713+0.287+7.61.57+0.245+7.6.02+3.6+1.980.134+2.66+0.8661.27+3.9+0.73+16.1 .5+4.9-6.53.07-0.38-1.1.29+3.7+2.71+6.8-2.45-1.553.25+1.79-0.59+1.7523.4-0.8-13.4-7.0.32×4033.2+0.36+4.8+1.61.23+3.4-0.23+6.60.25×3612.7-6.54-1.76-4.540.25×0.73×4五年级数学简便计算练习卷二18.76×9.9+18.763.52÷2.5÷0.4.9-4.1+6.1-5.95.6÷3.9.6÷0.8÷0..2×99+4.217.8÷0.49÷1. 1.25×2.5×323.65×10.115.2÷0.25÷40.89×100.1 146.5-3.83×4.56+3.83×5.444.36×12.5×89.7×99+9.727.5×3.7-7.5×3.78.54÷2.5÷0.0.65×101.2×0.25×12.5÷8÷0.1253.14×0.68+31.4×0.032.6÷1.25÷0.8÷2.5÷0.47.2×0.2+2.4×1..9×1.01.74×+1.5×2.263.9×2.7+3.9×7.318-1.8÷0.125÷0.12.7×9.9+1.2721×-5.615.02-6.8-1.025.4×11-5.42.3×16+2.3×23+2..43- .65×4.7-36.5×0.37五年级数学简便计算练习卷一下面各题怎样算简便就怎样算.6.9+4.8+3.1 0.456+6.22+3.715.89+4.02+5.4+0.9.17-1.8-3.213.75-3.68+7.56-2.6.85+2.34-0.85+4.6635.6-1.8-15.6-7.23.82+2.9+0.18+9.1.6+4.8-3..14-0.53-2.475.27+2.86-0.66+1.13.35-4.68+2.65.8-1.64-13.8-5.36 47.8-7.45+8.80.398+0.36+3.6415.75+3.59-0.59+14.25 66.86-8.66-1.3 0.25×16.2××83.6×1023.72×3.5+6.28×3.536.8-3.9-6.115.6×13.1-15.6-15.6×2.14.8×7.8+78×0.522+4.9-0.9 4.8×100.16.5×9.9+56..09×10.8-0.8×7.0925.48-.2÷3.5320÷1.25÷8小学五年级上数学简便运算归类练习明确三点:1、一般情况下;四则运算的计算顺序是:有括号时;先算;没有括号时;先算;再算;只有同一级运算时;从左往右 .2、由于有的计算题具有它自身的特征;这时运用运算定律;可以使计算过程简单;同时又不容易出错.加法交换律:a+b=b+a加法结合律:+c=a+乘法交换律:a×b=b×a乘法结合律:×c=a×乘法分配律:×c=a×c+b×c3、注意;对于同一个计算题;用简便方法计算;与不用简便方法计算得到的结果相同.我们可以用两种计算方法得到的结果对比;检验我们的计算是否正确.一、变换位置当一个计算题只有同一级运算又没有括号时;我们可以带符号搬家.a+b+c=a+c+b a+b-c=a-c+b a-b+c=a+c-b a-b-c=a-c-b a×b×c=a×c×b a÷b÷c=a÷c÷b a×b÷c=a÷c×ba÷b×c=a×c÷b根据:加法交换律和乘法交换律12.06+5.07+2.91773+174-7730.34-10.2+9.6625×7×434÷4÷1.7102×7.3÷5.1125÷2××3÷7×3195-37-95二.加括号1、当一个计算题只有加减运算又没有括号时;我们可以在加号后面直接添括号;括到括号里的运算原来是加还是加;是减还是减.但是在减号后面添括号时;括到括号里的运算;原来是加;现在就要变为减;原来是减;现在就要变为加.根据加法结合律a+b+c=a+,a+b-c=a +,a-b+c=a-, a-b-c= a-1132+752+35874+295-952-383+81.06-19.72-20.282、当一个计算题只有乘除运算又没有括号时;我们可以在乘号后面直接添括号;括到括号里的运算;原来是乘还是乘;是除还是除.但是在除号后面添括号时;括到括号里的运算;原来是乘;现在就要变为除;原来是除;现在就要变为乘.根据乘法结合律a×b×c=a×, a×b÷c=a×,a÷b÷c=a÷, a÷b×c=a÷,1.06×2.5×417×0.6÷0. 18.6÷2.5÷0.400÷14×2三.去括号1、当一个计算题只有加减运算又有括号时;我们可以将加号后面的括号直接去掉;原来是加现在还是加;是减还是减.但是将减号后面的括号去掉时;原来括号里的加;现在要变为减;原来是减;现在就要变为加.a+= a+b+c a += a+b-c a- = a-b+c a-= a-b-c5.68+ 172+76- 19.68-2、当一个计算题只有乘除运算又有括号时;我们可以将乘号后面的括号直接去掉;原来是乘还是乘;是除还是除.但是将除号后面的括号去掉时;原来括号里的乘;现在就要变为除;原来是除;现在就要变为乘.a× = a×b×ca× = a×b÷ca÷ = a÷b÷ca÷ = a÷b×c0.25× 1.25×÷4÷1.25×四、乘法分配律的两种典型类型1、括号里是加或减运算;与另一个数相乘;注意分配×2125×6×24×86× 15×2、注意相同因数的提取.0.92×1.41+0.92×8.51.3×11.6-1.6×1.3五、一些简算小技巧1、巧借;可要注意还哦有借有还;再借不难嘛. 9999+999+99+921-9982、分拆;可不要改变数的大小哦3.2×12.5×1.25×883.6×0.253、注意构造;让算式满足乘法分配律的条件.3.8×9.9+0.382.6×9.998×3.27+6.54101×2.17-2.170.25×16.2××.6×1023.72×3.5+6.28×3.515.6×2.1-15.6×1.1.8×10.156.5×99+56.51.25×2.5×327.09×10.8-0.8×7.09.83×4.56+3.83×5.44.36×12.5×8。
(精品)苏教版五年级数学上册简便计算训练
五年级上册简便计算训练【知识要点】A、一般情况下,四则运算的计算顺序是:有括号时,先算,没有括号时,先算,再算,只有同一级运算时,从左往右。
B、由于有的计算题具有它自身的特征,这时运用运算定律,可以使计算过程简单,同时又不容易出错。
C、注意,对于同一个计算题,用简便方法计算,与不用简便方法计算得到的结果应该相同。
我们可以用两种计算方法得到的结果对比,检验我们的计算是否正确。
一、当一个计算题只有同一级运算(只有乘除或只有加减运算)又没有括号时,我们可以“带符号搬家”。
用字母表示:a+b+c=a+c+b, a+b-c=a-c+b, a-b+c=a+c-b, a-b-c=a-c-b; A×b×c=a×c×b, a÷b÷c=a÷c÷b, a×b÷c=a÷c×b,a÷b×c=a×c÷b【练习】12.06+5.07+2.94 30.34+9.76-10.34 7.325-3.29-3.32534÷4÷1.7 102×7.3÷5.1 25×7×4 7.5+2.5-7.5+2.5二A、当一个计算题只有加减运算又没有括号时,我们可以在加号后面直接添括号,括到括号里的运算原来是加还是加,是减还是减。
但是在减号后面添括号时,括到括号里的运算,原来是加,现在就要变为减;原来是减,现在就要变为加。
用字母表示:a+b+c=a+ (b + c ), a+b-c=a +(b-c),a-b+c=a –(b-c), a-b-c= a-( b +c)【练习】933-15.7-4.3 41.06-19.72-20.28 3.29+0.73-2.29+2.2723.4-0.8-13.4-7.2 36.54-1.76-4.54 3.25+1.79-0.59+1.75B、当一个计算题只有乘除运算又没有括号时,我们可以在乘号后面直接添括号,括到括号里的运算,原来是乘还是乘,是除还是除。