正數和負數的加減法

2008-09-13 5:27 am

1) (+4)-(-4)-(+4)=4__4__4
=______________________
=_______

2)(-8)+(-3)+(-5)=______

3)(+7)-(-2)-(+5)=______

4)(-4.5)-(+3)=______

回答 (4)

2008-09-13 10:47 pm

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

2) (-8)+(-3)+(-5)
=(-8)-3-5
=(-11)-5
=-16

3) (+7)-(-2)-(+5)
=7+2-5
=9-5
=4

4) (-4.5)-(+3)
=(-4.5)-3
=-7.5

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2008-09-13 7:10 am

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

2) (-8)+(-3)+(-5)
=-8-3-5
=-11-5
=-16

3) (+7)-(-2)-(+5)
=7+2-5
=9-5
=4

4) (-4.5)-(+3)
=-4.5-3
=-7.5

參考: me

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2008-09-13 5:33 am

１，＝　４－４＋４

２，＝　－８－３－５＝　－１６
３，＝　７＋２－５　＝　４
４．＝　－４．５－３＝　－７．５

2008-09-12 21:35:22 補充：
第２題點會＝６　　．．．．
－８－３－５＝－１６

參考: 自己

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2008-09-13 5:33 am

1.(+4)-(-4)-(+4)=4+4-4=4

2.(-8)+(-3)+(-5)=-8-3+5=-6

3.(+7)-(-2)-(+5)=7+2-5=4

4.(-4.5)-(+3)=-4.5-3=-7.5

參考: ME

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