1. 1- (1/3 減 1/-4 ) 除 ( -1/2 減1/5)
分數黎ga!
2.3(-5)^3 / ( -15 )
f.1maths!!有向數
2008-01-01 3:09 am
回答 (3)
2008-01-01 3:22 am
✔ 最佳答案
1. 1- [1/3 - 1/(-4)] / [(-1)/2 - 1/5]= 1- (4/12 + 3/12) / (- 5/10 - 2/10)
= 1- (7/12) / (-7/10)
= 1- (7/12) * [10/(-7)]
= 1+ 5/6
= 1 又 5/6
2. 3(-5)^3 / (-15)
= 3(-5)^2 / 3
= (-5)^2
= 25
2008-01-01 5:00 am
1. 5/12 除-7/10
5/12X-10/7=25/42
2. (225X-15)/(-15)=225
5/12X-10/7=25/42
2. (225X-15)/(-15)=225
2008-01-01 3:55 am
1-(1/3-1/-4)除(-1/2-1/5)
=1/5/6
=1/5/6
收錄日期: 2021-04-24 10:10:51
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071231000051KK03532