rpct.net
当前位置:首页 >> 1.25×0.32×2.5 2.5怎么简便计算 >>

1.25×0.32×2.5 2.5怎么简便计算

乘法结合律

2.5×0.32×1.25 = 2.5×1.25×0.4×0.8 =(2.5×0.4)×(1.25×0.8) =1×1 =1

1.25×0.32×1.25 =(1.25×0.8)*(0.4×1.25) =1*0.5 =0.5

=1.25×0.8×0.4×2.5+2.5 =1×1+2.5 =3.5

0.032×2.5×1.25 =0.4×2.5×0.08×1.25 =1×0.1 =0.1

原式等于 2.5×4×(1.25×8) =10×10 =100 所以原式的计算结果为100.

1.25×0.52×2.5怎么简便计算 1.25×0.52×2.5 =1.25x4x0.13x2.5 =5x2.5x0.13 =12.5x0.13 =12.5x0.1+12.5x0.03 =1.25+0.375 =1.625

32x1.25X2.5 =4x8x1.25x2.5 =(4x2.5)x(8x1.25) =10x10 =100 请采纳正确答案,你们只提问,不采纳正确答案,回答都没有劲!谢谢管理员推荐采纳!! 朋友,请【采纳答案】,您的采纳是我答题的动力,如果没有明白,请追问。谢谢。

0.32×1.25×2.5 =0.4×0.8×1.25×2.5 =(0.8×1.25)×(0.4×2.5) =1×1 =1

(1)25×0.32×2.5=25×0.04×4×2×2.5=(25×0.04)×(4×2.5)×2=1×10×2=10×2=20;(2)1.25×6.78+25×3.47+125×0.0382=1.25×6.78+125×0.0382+25×3.47=125×0.0678+125×0.0382+25×3.47=125×(0.0678+0.0382)+25×3.47=125×0.106+25×3.47=25×0.53+25×3....

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