1.abc
2. -a-(-b)+c
3.2a-b-c
4.a+b
------
c
更新1:
１。（－１）－（－３）＋（＋９） ２。（－３６）＋（－９）－（－１８） ３。（－８）Ｘ（－２）Ｘ（＋３） ４。（＋３）除（－７）除（＋ 七分之一 ）
數學問題(急用)
回答 (9)
2007-09-01 1:36 am
✔ 最佳答案
1. 62. 4
3. -6
4. 1
2007-09-01 2:35 am
1. abc = (-2) x 3 x (-1) = 6
2. -a-(-b)+c = -(-2)-(-3)+(-1) = 2+3-1 = 4
3. 2a-b-c = 2 x (-2) - 3 - (-1) = -4-3+1 = 0
4. a+b
------
c
-2 + 3
= ----------
-1
1
= ----
-1
= -1
5.（－１）－（－３）＋（＋９） = -1+3+9 = 11
6.（－３６）＋（－９）－（－１８）= -36-9+18 = 27
7.（－８）Ｘ（－２）Ｘ（＋３）= 16 x 3 = 48
8.（＋３）除（－７）除（＋ 七分之一 ）
3 3 3
------------------ = ------------- = --------
(-7) -7 x 7 -49
-----------
1
( ------)
7
2. -a-(-b)+c = -(-2)-(-3)+(-1) = 2+3-1 = 4
3. 2a-b-c = 2 x (-2) - 3 - (-1) = -4-3+1 = 0
4. a+b
------
c
-2 + 3
= ----------
-1
1
= ----
-1
= -1
5.（－１）－（－３）＋（＋９） = -1+3+9 = 11
6.（－３６）＋（－９）－（－１８）= -36-9+18 = 27
7.（－８）Ｘ（－２）Ｘ（＋３）= 16 x 3 = 48
8.（＋３）除（－７）除（＋ 七分之一 ）
3 3 3
------------------ = ------------- = --------
(-7) -7 x 7 -49
-----------
1
( ------)
7
2007-09-01 2:12 am
1. 6
2. 4
3. -6
4. -1
2. 4
3. -6
4. -1
2007-09-01 1:50 am
當a= -2 ， b=3，c= -1
1.abc
= -2 x 3 x (-1)
= 6
2. -a-(-b)+c
=- ( - 2 ) - ( - 3 ) + ( -1 )
= 2 + 3 - 1
= 4
3.2a-b-c
=2 x ( - 2) - 3 -( -1 )
= - 4 - 3 + 1
= - 6
4.a+b
------
c
= - 2 x 3
------
- 1
= 6
1.abc
= -2 x 3 x (-1)
= 6
2. -a-(-b)+c
=- ( - 2 ) - ( - 3 ) + ( -1 )
= 2 + 3 - 1
= 4
3.2a-b-c
=2 x ( - 2) - 3 -( -1 )
= - 4 - 3 + 1
= - 6
4.a+b
------
c
= - 2 x 3
------
- 1
= 6
參考: me
2007-09-01 1:39 am
其實你係咪想求C? 你已經過左C係-1
基本上A B C你都講晒我知...我想知你求咩未知數-V-"
2007-08-31 17:40:46 補充：
@我MSN詳細D教下你. [email protected]
基本上A B C你都講晒我知...我想知你求咩未知數-V-"
2007-08-31 17:40:46 補充：
@我MSN詳細D教下你. [email protected]
2007-09-01 1:39 am
1. abc
= (-2)(3)(-1)
= 6
2. -a-(-b)+c
= -(-2)-(-3)+(-1)
= 4+3-1
= 6
3. 2a-b-c
= 2(-2)-(3)-(-1)
= -4-3+1
= -6
4. a+b
= (-2)+(3)
= -2+3
= 1
不好意思~
我不明白你最後說的'c'~
所以可能第4題不準確...
希望可以幫到你啦~
2007-08-31 17:42:03 補充：
如果你第4題是想這樣說: a+b-c= (-2)+(3)-(-1)= -2+3+1= 1+1= 2
2007-08-31 17:43:26 補充：
對不起~第二題計錯了~應該是這樣的:2. -a-(-b)+c= -(-2)-(-3)+(-1)= 2+3-1= 4
= (-2)(3)(-1)
= 6
2. -a-(-b)+c
= -(-2)-(-3)+(-1)
= 4+3-1
= 6
3. 2a-b-c
= 2(-2)-(3)-(-1)
= -4-3+1
= -6
4. a+b
= (-2)+(3)
= -2+3
= 1
不好意思~
我不明白你最後說的'c'~
所以可能第4題不準確...
希望可以幫到你啦~
2007-08-31 17:42:03 補充：
如果你第4題是想這樣說: a+b-c= (-2)+(3)-(-1)= -2+3+1= 1+1= 2
2007-08-31 17:43:26 補充：
對不起~第二題計錯了~應該是這樣的:2. -a-(-b)+c= -(-2)-(-3)+(-1)= 2+3-1= 4
2007-09-01 1:37 am
當a= -2 ， b=3，c= -1
1.abc
= -2x3x-1
=6
2. -a-(-b)+c
=-(2)-(-3)+1
=-2+3+1
= 2
3.2a-b-c
=2x(-2)-3-1
= -4-3-1
=-8
4.a+b-c ????????
= -2+3+(-1)
= -2+3-1
=0
1.abc
= -2x3x-1
=6
2. -a-(-b)+c
=-(2)-(-3)+1
=-2+3+1
= 2
3.2a-b-c
=2x(-2)-3-1
= -4-3-1
=-8
4.a+b-c ????????
= -2+3+(-1)
= -2+3-1
=0
2007-09-01 1:36 am
1.6
2.0
3.-6
4.-1
2.0
3.-6
4.-1
2007-09-01 1:36 am
1.
abc
=(-2)(3)(-1)
=6
2.
-a-(-b)+c
=-(-2)-(-3)+(-1)
=2+3-1
=4
3.
2a-b-c
=2(-2)-(3)-(-1)
=-4-3+1
=-6
4.
a+b
=-2+3
=1
abc
=(-2)(3)(-1)
=6
2.
-a-(-b)+c
=-(-2)-(-3)+(-1)
=2+3-1
=4
3.
2a-b-c
=2(-2)-(3)-(-1)
=-4-3+1
=-6
4.
a+b
=-2+3
=1
收錄日期: 2021-04-29 18:57:56
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https://hk.answers.yahoo.com/question/index?qid=20070831000051KK04439