xqzz.net
当前位置:首页 >> 4.25×9.9+42.5的简算怎么算 >>

4.25×9.9+42.5的简算怎么算

4.25*9.9+42.5的简算4.25*9.9+42.5=4.25*9.9+4.25*0.1=4.25*(9.9+0.1)=4.25*10=42.5

这道题这样算,利用乘法结合律.算式4.25*(9.9+0.1)=42.5

4.25x9.9+42.5等于4.25x10-0.1x4.25+42.5=42.5-0.425+42.5=84.575

4.25+9.9x42.5=42.5*0.1+9.9*42.5=42.5*(0.1+9.9)=42.5*10=425

4.25*9.9=4.25*(10-0.1)=4.25*10-4.25*0.1=42.5-0.425=42.075

36.25÷4.25*9.9=(36.25*4)÷(4.25*4)*9.9=145÷17*9.9=[145*(10-0.1)]÷17=(145*10-145*0.1)÷17=(1450-14.5)÷17=1435.5÷17

36.72÷4.25x9.9=8.16x9.9=8.16*(10-0.1)=8.16*10-8.16*0.1=81.6-0.816=80.784

4.25*(10-0.1)=4.25*10-4.25*0.1=42.5-0.425=42.075

36.25/4.25*9.9= 145/17*99/10= 29/17*99= 29/17*(98+1)= 29/17*98+29/17= 29*7+1又12/17= 203+ 1又12/17= 204又12/17

4.25÷2.5x9.9+0.17 =0.17x(25÷2.5x9.9+1) =0.17x(10x9.9+1) =0.17x100 =17

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