[(-5)(-2)-(+3)(+4)]/[(-6)+(-4)]x(+2)要有步驟
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唔識計數!!!20分
2010-09-17 6:16 am
回答 (6)
2010-09-17 6:29 am
✔ 最佳答案
步驟如下[(-5)(-2)-(+3)(+4)]/[(-6)+(-4)]x(+2)
= (10-12) / (-10)x(2)
= (-2) / (-20)
= 1/10
答案系十分之一
提一下：
1. 負數 x 負數 = 正數
2. 如果有個正數，例如： (+2）個“+”字唔洗寫出黎
希望幫到你～～ :D
2010-09-16 22:41:10 補充：
其實你可以用計數機check下：
先計[(-5)(-2)-(+3)(+4)]，(-5)(-2) = 10，(+3)(+4）=12，10 - 12 = -2， 呢個系個分子。
之後計[(-6)+(-4)]x(+2)， （-6）+（-4）即 （-6-4）= -10， （-10）x2 = -20 呢個系個分母。
最後計（-2）/（-20） = 1/10 = 0.1
2010-09-19 19:43:11 補充：
受教了～對網上的數學符號不太熟悉～
參考: 我自己, myself
2010-09-17 9:28 am
I think only 回答者Sky gets the right answer. The answer should be 0.4.
Consider two 大括號 first, [ ]/[ ]. Get the quotient, then multiplied by (+2). (+2) is not part of the denominator. If (+2) is, it should be inside another bracket { }, like { }/{[ ] x (+2)}.
Consider two 大括號 first, [ ]/[ ]. Get the quotient, then multiplied by (+2). (+2) is not part of the denominator. If (+2) is, it should be inside another bracket { }, like { }/{[ ] x (+2)}.
2010-09-17 7:35 am
[(-5)(-2)-(+3)(+4)]/[(-6)+(-4)]x(+2)]
= (10-12) / (-10)x(2)
=-2/-20
= 1/10
方法:
1.正數 x 正數 = 正數 eg. 1x1=1
2.負數 x 負數 = 正數 eg.(-1) x (-1) = 1
3.正數 x 負數 = 負數 eg. 1 x (-1) = -1
4.負數 x 正數 = 負數 eg. (-1) x 1 = -1
= (10-12) / (-10)x(2)
=-2/-20
= 1/10
方法:
1.正數 x 正數 = 正數 eg. 1x1=1
2.負數 x 負數 = 正數 eg.(-1) x (-1) = 1
3.正數 x 負數 = 負數 eg. 1 x (-1) = -1
4.負數 x 正數 = 負數 eg. (-1) x 1 = -1
參考: me
2010-09-17 6:31 am
[(-5)(-2)-(+3)(+4)]/[(-6)+(-4)]x(+2)
=[-5-2-3+4]/[-6-4]x+2
=[-10+4]/-10x+2
=-6/-(10x2)
=-6/-20
=+(6/20)
=+3.33
i don't know is it right , i am just from 1 student , u can try ( 2 dp )
=[-5-2-3+4]/[-6-4]x+2
=[-10+4]/-10x+2
=-6/-(10x2)
=-6/-20
=+(6/20)
=+3.33
i don't know is it right , i am just from 1 student , u can try ( 2 dp )
參考: myself
2010-09-17 6:24 am
[(-5)(-2)-(+3)(+4)]/[(-6)+(-4)]x(+2) （計左大括號內的算先。再計其他）
=[(+10)-(+12)]/[(-6)+(-4)]x(+2)
=(-2)/[(-6)+(-4)]x(+2)
=(-2)/(-10)x(+2)
=+0.2x(+2)
=0.4
希望幫到你！
2010-09-18 00:25:26 補充：
係喔。計錯左......多謝提醒
=[(+10)-(+12)]/[(-6)+(-4)]x(+2)
=(-2)/[(-6)+(-4)]x(+2)
=(-2)/(-10)x(+2)
=+0.2x(+2)
=0.4
希望幫到你！
2010-09-18 00:25:26 補充：
係喔。計錯左......多謝提醒
收錄日期: 2021-04-29 16:56:48
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