我唔好識計,可唔可以幫吓我
1. -{-2/11 [(- 4)-(-1/3)]}
2. 1/8-[1-(- 3/4+3/8 )]
3. -5-{-5-[-5(-5)]}
有向數 (3題) F.1 >o
2009-07-18 8:13 pm
回答 (1)
2009-07-18 8:22 pm
✔ 最佳答案
1. -{-2/11 [(- 4)-(-1/3)]} =-[2/11(-4+1/3)]
=-2/11(-11/3)
=2/3
2. 1/8-[1-(- 3/4+3/8 )]
=1/8-[1-(-3/8)]
=1/8-(1+3/8)
=1/8-11/8
=-10/8
=-5/4
3. -5-{-5-[-5(-5)]}
=-5-[-5-(25)]
=-5-(-30)
=-5+30
=25
收錄日期: 2021-04-23 20:38:04
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090718000051KK00620