i don't how to do?
a) (+5)(-2)(-3)(+6)(-4.2)(-7.3)(-1.1)(-10.9)=
b) (-15)(-16)(+12) / (+10)(-19)(+14) =
please help me (f.1)
2010-02-04 8:22 am
回答 (3)
2010-02-05 6:03 am
✔ 最佳答案
首先"正正得正, 負負得正, 正負得負, 負正得負"(a)
(+5)(-2)(-3)(+6)(-4.2)(-7.3)(-1.1)(-10.9)
=[(+5)(-2)][(-3)(+6)][(-4.2)(-7.3)][(-1.1)(-10.9)]
=(-10)(-18)(30.66)(11.99)
=(180)(367.6134)
=66170.412
(b)
(-15)(-16)(+12) / (+10)(-19)(+14) {先約簡)
=(-3)(-16)(12) / (2)(-19)(14)
=(-3)(-8)(12) / (2)(-19)(7)
=288 / -266
=-144 / 133
希望幫到你^^
參考: me
2010-02-06 2:35 am
a)
(+5)(-2)(-3)(+6)(-4.2)(-7.3)(-1.1)(-10.9)
[(+5)(-2)] [(-3)(+6)] [(-4.2)(-7.3)] [(-1.1)(-10.9)] 兩個兩個黎冇咁亂
=[(-10)(-18)] [(30.66)(11.99)]
=(180)(367.6134)
=66170.412
b)
(-15)(-16)(+12)/(+10)(-19)(+14)
=+144/-133
=-144/133
(+5)(-2)(-3)(+6)(-4.2)(-7.3)(-1.1)(-10.9)
[(+5)(-2)] [(-3)(+6)] [(-4.2)(-7.3)] [(-1.1)(-10.9)] 兩個兩個黎冇咁亂
=[(-10)(-18)] [(30.66)(11.99)]
=(180)(367.6134)
=66170.412
b)
(-15)(-16)(+12)/(+10)(-19)(+14)
=+144/-133
=-144/133
參考: me
2010-02-04 10:23 pm
a) (+5)(-2)(-3)(+6)(-4.2)(-7.3)(-1.1)(-10.9)=
+(5 * 2 * 3 * 6 * 4.2 * 7.3 * 1.1 * 10.9)=
=66170.412
b) (-15)(-16)(+12) / (+10)(-19)(+14) =
=+(15 * 16 * 12) / -(10 * 19 * 14)
= - (2880/2660)
= - 144/133
+(5 * 2 * 3 * 6 * 4.2 * 7.3 * 1.1 * 10.9)=
=66170.412
b) (-15)(-16)(+12) / (+10)(-19)(+14) =
=+(15 * 16 * 12) / -(10 * 19 * 14)
= - (2880/2660)
= - 144/133
收錄日期: 2021-04-19 21:15:35
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100204000051KK00029