(7-h)-(3+h)-(2h+1)
=(7-3-1)-(2h+h+h)
=3-4h
我想問我咁計岩唔岩架?
同埋我想問其實係咪張正數既+號同h既-號調轉呢?
and 係咪條條都係張d符號調黎調去架?
因為我未學-.-教教我丫~
好似好難咁~
Maths,,,教下我~
2008-08-20 10:46 pm
回答 (3)
2008-08-24 11:11 pm
✔ 最佳答案
計le d數要拆括號先有規則架
＋＋得＋
－－得＋
＋－得－
５係張正數既+號同h既-號調轉.
條條都係張d符號調黎調去架?
咁就要睇下你條數係點,le條就要,因為有括號.冇括號都5洗了
eg . 5-4-2h+2-7+h
= -4-h
你個題就係咁
(7-h)-(3+h)-(2h+1)
=7-h-3-h-2h-1
=3-4h
參考: 自己
2008-08-21 12:13 am
(7-h)-(3+h)-(2h+1)
=7-h-3-h-2h-1
=7-3-1-h-h-2h
=3-4h
h=3/4
=7-h-3-h-2h-1
=7-3-1-h-h-2h
=3-4h
h=3/4
2008-08-20 10:59 pm
(7-h)-(3+h)-(2h+1)
=7-h-3-h-2h-1
=7-3-2h-h-1
=7-3-1-h
=3-h
=7-h-3-h-2h-1
=7-3-2h-h-1
=7-3-1-h
=3-h
收錄日期: 2021-04-13 15:59:24
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080820000051KK01641