(a) (-2分之1)-(-4分之1)除(+2分之1)
(b) (+3分之2)-(-12分之5)乘(+5分之4)
(c) (-5分之2)(+4分之5)+(+12分之7)除(-6分7)
要步驟喔~Thz
更新1:
超凡學生 ：你有兩題錯左
F1. Maths~~~~【20分】
2010-01-02 2:55 am
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(a) (-2分之1)-(-4分之1)除(+2分之1)
(b) (+3分之2)-(-12分之5)乘(+5分之4)
(c) (-5分之2)(+4分之5)+(+12分之7)除(-6分7)
要步驟喔~Thz
(a) (-2分之1)-(-4分之1)除(+2分之1)
(b) (+3分之2)-(-12分之5)乘(+5分之4)
(c) (-5分之2)(+4分之5)+(+12分之7)除(-6分7)
要步驟喔~Thz
回答 (2)
2010-01-02 3:21 am
✔ 最佳答案
(a) (-1/2)-(-1/4)/(2/1)=(-1/2)-(-1/4)x2
=(-1/2)-(-1/2)
=(-1/2)+1/2
=0
(b) (2/3)-(-5/12)x(4/5)
=(2/3)-(-1/3)
=(2/3)+1/3
=3/3
=1
(c) (-2/5)x(5/4)+(7/12)/(-7/6)
=(-1/2)+(7/12)x(-6/7)
=(-1/2)+(-1/2)
=(-1/2)-1/2
=-2/2
=-1
2010-01-02 3:19 am
收錄日期: 2021-04-23 20:39:34
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https://hk.answers.yahoo.com/question/index?qid=20100101000051KK03082