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2007-12-07 3:46 am
(+9)+(-2)
=?

回答 (6)

2007-12-07 3:51 am
✔ 最佳答案
=(+9)-2
=+7
參考: me
2007-12-07 3:56 am
9-2=7
2007-12-07 3:52 am
(+9)+(-2)=7
正9加負2
加負得負
加變減所以9-2=7
參考: 自己
2007-12-07 3:52 am
等於7呀!
2007-12-07 3:52 am
正負得負:

(+9)+(-2)

= 9-2

=7

∴ 答案是 7
2007-12-07 3:52 am
(+9)+(-2)
=9-2
=7

..........


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