S.1數學(10分)急)急)急)急)急)急)

2007-09-18 3:28 am
-12+[10-(-8)-25]-(2-15+14)
=______

要寫埋個步驟呀!好似:
0-[(-5)-(-7)]
=0-[-5+7]
=0-(-2)
=-2
一定要呀!記住呀!

THANK 曬!
聽日交喇!
唔該幫幫手!

回答 (4)

2007-09-18 4:34 am
-12+[10-(-8)-25]-(2-15+14)
= -12 + ( -7 ) - 1
= - 20
參考: 計數機`
2007-09-18 3:42 am
-12+{10-(-8)-25}-(2-15+14)
=-12+(10+8-25)-(2-15+14)
=-12+10+8-25-2+15-14
=-20
參考: me
2007-09-18 3:37 am
-12+[10-(-8)-25]-(2-15+14)
=-12+[10+8-25]-(-13+14)
=-12+(-7)-(+1)
=-12-7-1
=-20

2007-09-17 19:39:43 補充:
上面個D錯左~~
參考: 我
2007-09-18 3:35 am
-12+[10-(-8)-25]-(2-15+14)
=-12+(10+8-25)-(2-15+14)
=-12+(-7)-(2-15+14)
=-12+(-7)-(1)
=-12-7-1
=-5-1
=-6
參考: by me


收錄日期: 2021-04-13 13:32:41
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