bmfs.net
当前位置:首页 >> 11/8一2/5十5/8一3/5怎算简便算 >>

11/8一2/5十5/8一3/5怎算简便算

11/8一2/5十5/8一3/5 =11/8十5/8一(2/5+3/5) =2-1 =1

5÷11×88+3÷8×88

2+5+8+11……+23 =(2+23)×8÷2 =25×8÷2 =100

解:原式=5/8-(1/2*5/11+3/5*5/11) =5/8-(5/22+3/11) =5/8-(5/22+6/22) =5/8-11/22 =5/8-1/2 =5/8-4/8 =1/8

答 案 及 过 程 详 见 图 示

采纳哦

五又十一分之三-2.375+一又十一分之八-三又八分之五 =五又十一分之三+一又十一分之八-三又八分之五-2.375 =(5+3/11+1+8/11)-(3+5/8+2.375) =(6+1)-(3.625+2.375) =7-6 =1

1/(2×5)+1/(5×8)+1/(8×11)+……+1/(29×32) =1/3×[1/2-1/5+1/5-1/8+1/8-1/11+……+1/29-1/32] =1/3×[1/2-1/32] =1/3×15/32 =5/32

5/8-(1/2+3/5)×5/11=5/8-(5/22+3/11)==5/8--1/2=1/8

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