1.若+6及-3分別代表向上走6層及向下走3層,利用有向數表示下列各情況:
(a)向上走4層
(b)向下走7層
2.(-9)-(-11) 3.(-3)+(-6) 4.(+2)-(-3) 5.(-7)-(-4)
6.(-2)x(+12) 7.(-2)x(-30) 8.(+50)÷(-25) 9.(-36)÷(-9)
10.昨天紐約及倫敦的日間最高溫度分別為-10℃及9℃,兩地的日間最高溫度之差為多少?
有向數暑期版本
2012-08-07 12:38 am
回答 (2)
2012-08-31 12:54 am
✔ 最佳答案
1.(a)+4
(b)-7
2.(-9)-(-11)
=-9+11
=2
3.(-3)+(-6)
=-3-6
=-9
4.(+2)-(-3)
=2+3
=5
5.(-7)-(-4)
=-7+4
=-3
6.(-2)x(+12)
=-24
7.(-2)x(-30)
=60
8.(+50)÷(-25)
=-2
9.(-36)÷(-9)
=4
10.兩地的日間最高溫度之差
=9-(-10)
=9+10
=19℃
參考: me
2012-08-31 7:21 am
1a : +4
1b : -7
2. (-9)-(-11)
= -9+11
= 2
3 . (-3)+(-6)
= -3-6
= -9
4 . (+2)-(-3)
=2+3
=5
5 . (-7)-(-4)
=-7+4
=-3
6 . (-2)x(+12)
= -24
7 . (-2)x(-30)
= 60
8 . (+50)÷(-25)
= -2
9 . (-36)÷(-9)
= 4
10. 9-(-10)
=19℃
兩地的日間最高溫度之差為19℃.
2012-08-30 23:23:18 補充：
你個x系咪= 乘 ??
定系代數??
1b : -7
2. (-9)-(-11)
= -9+11
= 2
3 . (-3)+(-6)
= -3-6
= -9
4 . (+2)-(-3)
=2+3
=5
5 . (-7)-(-4)
=-7+4
=-3
6 . (-2)x(+12)
= -24
7 . (-2)x(-30)
= 60
8 . (+50)÷(-25)
= -2
9 . (-36)÷(-9)
= 4
10. 9-(-10)
=19℃
兩地的日間最高溫度之差為19℃.
2012-08-30 23:23:18 補充：
你個x系咪= 乘 ??
定系代數??
參考: 自己
收錄日期: 2021-04-20 13:09:07
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20120806000051KK00717