fkjj.net
当前位置:首页 >> 39乘25这样用简便运算 >>

39乘25这样用简便运算

0.25x39+0.25 =0.25x(39+1) =0.25x40 =0.25x4x10 =1x10 =10

3900除括号39乘25的简便算法是多少? 3900/(39*25) =3900/39/25 =100/25 =4

解析: 1/4×39+3/4×25+(26/4)×1/13 =1/4×39+3/4×25+1/2 PS:能否将原题目拍照上传的??

(1/39+2/25)乘13+9/25的简便运算 解:运用分配律的简便方法, 原式=1/39x13+2/25x13+9/25 =1/3+26/25+9/25 =1/3+35/25 =1/3+1+2/5 =1+5/15+6/15 =1又11/15

39分之25乘30分之13,请用简便算法计算 39分之25乘30分之13 25/39*13/30 =5/3*1/6 =5/18

49×25/39 =(39+10)×25/39 =25+250/39 =25+6+16/39 =31又16/39

27*39-17*39=39*(27-17)=39*10=390 乘法分配律

0·39x199 =0·39x(200-1) =0·39x200-0·39x1 =78-0·39 =77·61

0.25×39+0.29 =(0.29-0.04)×39+0.29 =0.29×39-0.04×39+0.29 =0.29×(39+1)-1.56 =0.29×40-1.56 =11.6-1.56 =10.04

=39x(9+8-7) =39x10 =390

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