數學問題`有向數 - Ans.fyi 參考答案

數學問題`有向數

[匿名]

2008-09-30 3:15 am

我想問幾條問題...

係有向數來既...

1.A company had a rofit of $12000 in the first month,a loss of $14000 in the second month,a loss of $20000 in the third month and a profit of $8000 in the fourth.Use directed number to represent the net profit.

2.A dolphin jumped from 1.5m below the sea-level to 4m above the sea-level.It touched a ball and then descended 7m to the water
a)find the distance between the dolphin and the ball initilly
b)Use directed number to represent the distance between the dolphin and the sea-level finally.

回答 (2)

秋山澪

2008-10-01 12:31 am

✔ 最佳答案

(+12000)+(-14000)+(-8000)
= -10000

(-1.5)+(-7)
= -8.5

)(-1.5)+(+4)+(-7)
= -4.5

參考: me

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[匿名]

2008-09-30 3:25 am

1) (+12000)+(-14000)+(-8000)
= -10000

2a) (-1.5)+(-7)
= -8.5

2b)(-1.5)+(+4)+(-7)
= -4.5

參考: myself

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