(-4)(-2)+(+4)(-5)(-10)+(+10)(-10)
1. ---------------------------------------------- <分數線
888x111
(+4)(-20) (-6)(-24)
2. --------------+-------------
(-3)(+8) (+2)(-12)
3. a+b+c=70
4/5a=b
2/3b=c
(需有列式，答案，設題(1,2))
正負數三題(有點難)
2007-08-09 5:25 am
回答 (2)
2007-08-09 8:40 am
✔ 最佳答案
1.原式=(8+200-100)/(888x111)
=108/(888x111)
=3/2738
2.
原式=-(4x20x6x24)/(3x8x2x12)
=20
3.
bcz 4/5a=b
so 2/3b=c
2/3 X 4/5a=c
8/15a=c
so a+b+c=70
a+4/5a+8/15a=70
a(1+4/5+8/15)=70
a=70x3/7=30
b=30x4/5=24
c=30x8/15=16
2007-08-09 20:50:49 補充：
2.係-20先對
2007-08-09 11:39 pm
1. (-4)(-2)+(+4)(-5)(-10)+(+10)(-10)/888x111
=6+30+(-100)/98568
=6+30-100/98568
=-64/98568
=-8/12321
2. (+4)(-20) (-6)(-24)/(-3)(+8) (+2)(-12)
=(-80)(-6)(-24)/(-24)(+2)(-12)
=(+480)(-24)/(-48)(-12)
=(-11520)/(+576)
=-20
3. 不識
=6+30+(-100)/98568
=6+30-100/98568
=-64/98568
=-8/12321
2. (+4)(-20) (-6)(-24)/(-3)(+8) (+2)(-12)
=(-80)(-6)(-24)/(-24)(+2)(-12)
=(+480)(-24)/(-48)(-12)
=(-11520)/(+576)
=-20
3. 不識
參考: ＭＥ
收錄日期: 2021-04-13 18:04:01
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070808000051KK05843