有向數!!!! (最佳回答有20分)

2007-09-12 2:58 am
(-1)-(+2)=

(-12)-(-13)=

-7+(-3)=

(-6)-13=

(+4)-(+5)+(-2)=

(-4)+(-6)-(-5)=

2-(-4)+(-3)=

(-3)-2-(-4)=

(-3)-(-8)-(+4)=

-12+3-(+3)=


請給計算過程 謝謝 [[急....]]

回答 (6)

2007-09-12 3:01 am
✔ 最佳答案
(-1)-(+2)

=-1-2

=-3//





(-12)-(-13)

=-12+13

=1//



-7+(-3)

=-7-3

=-10//



(-6)-13

=-6-13

=-19//





(+4)-(+5)+(-2)=

=4-5-2

=4-7

=-3//





(-4)+(-6)-(-5)=

=-4-6+5

=-10+5

=-5//





2-(-4)+(-3)=

=2+4-3

=6-3

=3//





(-3)-2-(-4)=

=-3-2+4

=-5+4

=-1//





(-3)-(-8)-(+4)=

=-3+8-4

=-7+8

=1//





-12+3-(+3)=

=-12+3-3

=-15+3

=-12//


2007-09-12 3:17 am
1: (-1)-(+2)
﹦+1
2: (-12)-(-13)
﹦ (-12)+(13)
﹦ -25
3: -7+(-3)
﹦-10
4: (-6)-13
﹦-19
5: (+4)-(+5)+(-2)
﹦(-1)+(-2)
= -3
6: (-4)+(-6)-(-5)
= (-10)-(-5)
= (-10)+(5)
= -5
7: 2-(-4)+(-3)
= (-2)+(-3)
=- 5
8: (-3)-2(-4)
= -1(-4)
= 4
9:(-3)-(-8)-(+4)
= (-3)+(8)-(+4)
= (5)-(+4)
= 1
10:-12+3-(+3)
= -9-(+3)
= -9-3
= -12
參考: myself
2007-09-12 3:15 am
(-1) - (+2)
=(-1) - 2
= -3

(-12) - (-13)
=(-12) + 13
= 1

(-7) + (-3)
=(-7) - 3
= 10

(-6)-13
= - 19

(+4)-(+5)+(-2)
= 4 - 5 - 2
= -3

(-4)+(-6)-(-5)
= - 4 - 6 + 5
=- 5

2-(-4)+(-3)
=2 + 4 - 3
= 3

(-3)-2-(-4)
= 3 + 2 - 4
= -1

(-3)-(-8)-(+4)
= -3+8-4
= 1

(-12)+3-(+3)
= -12

=
參考: Myself
2007-09-12 3:15 am
(-1)-(+2)=+1 (-12)-(-13)=-25 (-7)+(-3)=-10 (-6)-13=7 (+4)-(+5)+(-2)=(-1)+(-2)=-3 (-4)+(-6)-(-5)=(-10)-(-5)=-5 2-(-4)+(-3)=(-2)+(-3)=-5 (-3)-2-(-4)=(-1)-(-4)=-3
(-3)-(-8)-(+4)=(-5)-(+4)=-1 (-12)+3-(+3)=(-9)+3=-6

~End~

2007-09-11 19:19:50 補充:
(-1)-( 2)= 1(-12)-(-13)=-25(-7) (-3)=-10(-6)-13=7( 4)-( 5) (-2)=(-1) (-2)=-3 (-4) (-6)-(-5)=(-10)-(-5)=-52-(-4) (-3)=(-2) (-3)=-5(-3)-2-(-4)=(-1)-(-4)=-3 (-3)-(-8)-( 4)=(-5)-( 4)=-1 (-12) 3-( 3)=(-9) 3=-6 ~End~
2007-09-12 3:08 am
1. = - 1 - 2 = -3
2. = - 12 + 13 = 1
3. = -7 - 3 = -10
4. = -19 (冇步驟)
5. = 4 - 5 - 2 = -1 - 2 = -3
6. =-4 - 6 + 5 = -10 + 5 = -5
7. = 2 + 4 - 3 = 6 - 3 = 3
8 = -5 + 4 = -1
9. = -3 + 8 - 4 = 5 - 4 = 1
10 = -9 - 3 = -12

正數係自己答案到可以唔洗+號
參考: hope i can help you
2007-09-12 3:05 am
1. (-1)-(+2)
=(-1)-2
=-3

2. (-12)-(-13)
=(-12)+13
=+1

3. -7+(-3)
=-7-3
=-1


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