ldcf.net
当前位置:首页 >> 2.5乘0.32乘1.25,脱式计算能简算的要简算 >>

2.5乘0.32乘1.25,脱式计算能简算的要简算

1.25x32 =1.25x8x4 =10x4 =40

(1)1.25×0.25×3.2×1.7,=1.25×0.25×(0.8×4)×1.7,=(1.25×0.8)×(0.25×4)×1.7,=1×1×1.7,=1.7;(2)1.3-3.79+9.7-6.21,=1.3+9.7-3.79-6.21,=(1.3+9.7)-(3.79+6.21),=11-10,=1;(3)6× 1 4 +13÷4-11×25%,=6× 1 4 +13× 1 4 -11...

13.2×7.5-75×0.32脱式计算能简算 =13.2x7.5-7.5x3.2 =(13.2-3.2)x7.5 =10x7.5 =75

脱式计算能简算的要简算2.5×1.6×1.25 2.5×1.6×1.25 =2.5×2×0.8×1.25 =5×1 =5

32*77+77*68 =77*(32+68) =77*100 = 7 700

2.5×1.6×1.25 =2.5x(1+0.6)x1.25 =(2.5+2.5x0.6)x1.25 =(2.5+1.5)x1.25 =4x1.25 =5

12.5x(100+8)=12.5x12.5=156.25

9x0.4x2.5=9x1=9

①1.25×4.8,=1.25×8×0.6,=10×0.6,=6; ②5.5×9.9+0.1×5.5,=(9.9+0.1)×5.5,=10×5.5,=55; ③3.45×102,=3.45×(100+2),=3.45×100+3.45×2,=345+6.9,=351.9;④3.17+0.83×1.6,=3.17+1.328,=4.498.

(1)2.5×7.1×4,=(2.5×4)×7.1,=10×7.1,=71;(2)16.12×99+16.12,=16.12×(99+1),=16.12×100,=1612;(3)5.2×0.9+0.9×4.8,=0.9×(5.2+4.8),=0.9×10,=9;(4)[113-(34.15+38.25)]÷2,=[113-72.4]÷2,=40.6÷2,=20.3;(5)3.6÷...

网站首页 | 网站地图
All rights reserved Powered by www.ldcf.net
copyright ©right 2010-2021。
内容来自网络,如有侵犯请联系客服。zhit325@qq.com