1.(-8)+(-5)=...
2.(+9)+(-2)=...
3.(+7)-(+12)=...
4.(-5)-(-6)=...
5.(+5)+(-7)+(-10)=...
6.(-6)-(-8)+(+4)=...
7.(-3)+(-4)-(-7)=...
8.(+4)-(-9)+(+5)=...
有向數!!!急!!!!!!!!!!!!!!!!二十點!!
2010-08-06 8:04 pm
回答 (6)
2010-08-10 5:13 am
✔ 最佳答案
1.(-8)+(-5)=(-8)-5
=-8-5
= -13
2.(+9)+(-2)
=(+9)-2
=+9-2
=+7
3.(+7)-(+12)
=(+7)-12
=+7-12
=-5
4.(-5)-(-6)
=(-5)+6
=-5+6
=+1
5.(+5)+(-7)+(-10)
=(+5)-7-10
=+5-7-10
=-12
6.(-6)-(-8)+(+4)
=(-6)+8+4
=-6+8+4
=+6
7.(-3)+(-4)-(-7)
=(-3)-4+7
=-3-4+7
=0
8.(+4)-(-9)+(+5)
=(+4)+9+5
=+4+9+5
=+18
參考: me
2010-08-18 2:43 pm
1.(-8)+(-5)
=-8-5
=-13
2.(+9)+(-2)
=+9-2
=+7
3.(+7)-(+12)
=+7-12
=-5
4.(-5)-(-6)
=-5+6
=+1
5.(+5)+(-7)+(-10)
=+5-7-10
=-12
6.(-6)-(-8)+(+4)
=-6+8+4
=+6
7.(-3)+(-4)-(-7)
=-3-4+7
=0
8.(+4)-(-9)+(+5)
=+4+9+5
=+18
=-8-5
=-13
2.(+9)+(-2)
=+9-2
=+7
3.(+7)-(+12)
=+7-12
=-5
4.(-5)-(-6)
=-5+6
=+1
5.(+5)+(-7)+(-10)
=+5-7-10
=-12
6.(-6)-(-8)+(+4)
=-6+8+4
=+6
7.(-3)+(-4)-(-7)
=-3-4+7
=0
8.(+4)-(-9)+(+5)
=+4+9+5
=+18
參考: ME
2010-08-08 12:02 am
1.-13 2.7 3. -5 4.1 5.-12 6.6 7.0 8.18
2010-08-07 3:43 am
1.(-8)+(-5)
= -8-5
= -13
2.(+9)+(-2)
= +9-2
= 7
3.(+7)-(+12)
= +7-12
= -5
4.(-5)-(-6)
=-5+5
= 0
5.(+5)+(-7)+(-10)
= +5-7-10
= -12
6.(-6)-(-8)+(+4)
= -6+8+4
= 6
7.(-3)+(-4)-(-7)
= -3-4+7
= 0
8.(+4)-(-9)+(+5)
= +4+9+5
= 18
2010-08-06 19:46:18 補充：
Sorry,第4題打錯左.
4.(-5)-(-6)
= -5+6
= -1
2010-08-06 19:47:35 補充：
Sorry,第4題再打錯左.
4.(-5)-(-6)
= -5+6
= 1
= -8-5
= -13
2.(+9)+(-2)
= +9-2
= 7
3.(+7)-(+12)
= +7-12
= -5
4.(-5)-(-6)
=-5+5
= 0
5.(+5)+(-7)+(-10)
= +5-7-10
= -12
6.(-6)-(-8)+(+4)
= -6+8+4
= 6
7.(-3)+(-4)-(-7)
= -3-4+7
= 0
8.(+4)-(-9)+(+5)
= +4+9+5
= 18
2010-08-06 19:46:18 補充：
Sorry,第4題打錯左.
4.(-5)-(-6)
= -5+6
= -1
2010-08-06 19:47:35 補充：
Sorry,第4題再打錯左.
4.(-5)-(-6)
= -5+6
= 1
2010-08-06 8:20 pm
1.(-8)+(-5)
= -(8+5)
= -13
2.(+9)+(-2)
=9-2
=+7
3.(+7)-(+12)
=7-12
=-5
4.(-5)-(-6)
= -(5+6)
= -11
5.(+5)+(-7)+(-10)
=5-7-10
= -12
6.(-6)-(-8)+(+4)
= -6+8+4
=+6
7.(-3)+(-4)-(-7)
= -3-4+7
=0
8.(+4)-(-9)+(+5)
=4+9+5
=+18
= -(8+5)
= -13
2.(+9)+(-2)
=9-2
=+7
3.(+7)-(+12)
=7-12
=-5
4.(-5)-(-6)
= -(5+6)
= -11
5.(+5)+(-7)+(-10)
=5-7-10
= -12
6.(-6)-(-8)+(+4)
= -6+8+4
=+6
7.(-3)+(-4)-(-7)
= -3-4+7
=0
8.(+4)-(-9)+(+5)
=4+9+5
=+18
參考: me
2010-08-06 8:08 pm
1=-13
2=+7
3=+19
4=+1
5=-12
6=+6
7=0
8=+10
2=+7
3=+19
4=+1
5=-12
6=+6
7=0
8=+10
收錄日期: 2021-04-13 17:25:02
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100806000051KK00536