www.ylrr.net > 10.1x26的简便运算

10.1x26的简便运算

10.1×26.9-1.25×26.9×0.8 =10.1×26.9-(1.25×0.8)×26.9 =26.9×(10.1-1.28×0.8) =26.9×(10.1-0.1) =26.9×10 =269

6.26X7.5+0.75X37.4 =7.5X(6.26+3.74) =7.5X10 =75

10.37x3.4+1.7x19.26 =10.37x(2x1.7)+1.7x19.26 =(10.37x2)x1.7+1.7x19.26 =20.74x1.7+1.7x19.26 =(20.74+19.26)x1.7 =40x1.7 =68

用竖式计算:17,04x0,26约等于,10,1除3,3=0,43x0,29约等于20除12约等 答案... 答案 展开  我来答 分享 微信扫一扫 网络繁忙请稍后重试 新浪微博 ...

2.639×83+26.39×36-263.9×1.9 =2.639×83+2.639×360-2.639×190 =2.639×(83+360-190) =2.639×253=2.639×(200+50+3) =2.639×200+2.639×50+2.639×3 =667.667

0.25×40×1.25=2.5×4×1.25 =10×1.25=12.5

(1)移项,得10x=8,系数化1,得x=45;(2)移项,得4x=6,系数化1,得x=32;(3)去分母,得4(x+1)-2(x-2)=3(4-x);移项,得5x=4,系数化1,得:x=45;(4)去分母,得2(x+1)-(3x-1)=25;移项,得-5x=-13,系数化1,得x=135.

=6.2×(300+1) =6.2×300+6.2×1 =1860+6.2 =1866.2

网站地图

All rights reserved Powered by www.ylrr.net

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