ldcf.net
当前位置:首页 >> 2.8x1.5%1.2的简便计算怎么写 >>

2.8x1.5%1.2的简便计算怎么写

1.5x1.2 =1.5x(1+0.2) =1.5x1+1.5x0.2 =1.5+0.3 =1.8 1.5x1.2 =(1+0.5)x1.2 =1x1.2+0.5x1.2 =1.2+0.6 =1.8

(1)1.2×2.5+2.8×2.5,=(1.2+2.8)×2.5,=4×2.5,=10;(2)4.8×2.5,=(4×1.2)×2.5,=(4×2.5)×1.2,=10×1.2,=12.

2.8X1.4+3.6X1.2 =(3-0.2)×1.4+(4-0.4)×1.2 =3X1.4-0.2X1.4+4X1.2-0.4X1.2 =4.2-0.28+4.8-0.48 =4.2+4.8-0.28-0.48 =9-0.28-0.48 =8.24

2.02X8.5 =2×8.5+0.02×8.5 =17+0.17 =17.17 1.25+4.6+0.75 =(1.25+0.75)+4.6 =2+4.6 =6.6 1.6X7.5x1.25 =(0.2×7.5)×(8×1.25) =1.5×10 =15 56X1.25 =7×(8×1.25) =7×10 =70 3.4x7X1.5 =(3.4×1.5)×7 =5.1×7 =35.7 0.8X0.25X0.4X12.5 =(0...

1.5x[1÷(2.1-2.09)] =1.5×【1÷0.01】 =1.5×100 =150

(1)1.2×2.5+2.8×2.5 =2.5×(1.2+2.8)=2.5×4=10 (2)4.8×2.5 =4×1.2×2.5=4×2.5×1.2=10×1.2=12(3)26.34-0.36-5.64=26.34-(0.36+5.64)=26.34-6=20.34

7.2+2.8-1.9=10-1.9=8.1

2.8X1.4+3.6X1.2=(3-0.2)×1.4+(4-0.4)×1.2=3X1.4-0.2X1.4+4X1.2-0.4X1.2=4.2-0.28+2.8-0.48=8.24

30-1.8*2.6=30-(-2*0.2)*2.6=30-(1-0.1)*5.2=30-5.2+0.52=24.8+0.52=25.32

等等,我写一下

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