www.zmzy.net > 25x11x28用脱式计算

25x11x28用脱式计算

25x11x28 =25×11×4×7 =25×4×11×7 =100×77 =7700

25x11x4 =25x4x11 =100x(10+1) =100x10+100x1 =1000+1

这道题这样算, 脱式3×11-8=33-8=25, 就是这样写。

=(4x0.25x22)x(9x11) =22x99 =22x100-22x1 =2200-22 =

答案

305X11+30.5X90 =305×11+305×9 =305×(11+9) =305×2

9/10×11-9/10 =9/10×(11-1) =9/10×10 =9

网站地图

All rights reserved Powered by www.zmzy.net

copyright ©right 2010-2021。
www.zmzy.net内容来自网络,如有侵犯请联系客服。zhit325@qq.com