ldcf.net
当前位置:首页 >> 1.2x2.5+0.8x2.5简便 >>

1.2x2.5+0.8x2.5简便

原式=(1.2+0.8)×2.5 =2×2.5 =5

=2.5*(1.2+0.8) =2.5*2 =5

什么?

等于(1.2乘以2.5)乘以(0.8乘以2.5)等于3乘以2等于6

1.2×2.5+0.8×2.5 =(1.2+0.8)×2.5 =2×2.5 =5

提取公因数2.5: 1.2X2.5+0.8X2.5 =2.5X(1.2+0.8) =2.5X2 =5

解:采用拆分法和结合律, 原式=1.2X2.5X0.8x2.5 =0.3x4x2.5x0.2x4X2.5 =0.3x10x0.2x10 =3x2 =6

2.5×(1.2+0.8)=5

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