有兩題數5知點計成24 答到有20點

👨🏻‍🏫 學術台數學

[匿名]

2008-10-31 10:54 pm

1. 6,-8,-4,3

2. -9,10,5,-1

依兩題都5知點計成24,請大家幫幫忙!!

回答 (5)

Jacob

2008-11-01 12:34 am

✔ 最佳答案

1. [6+(-8)]*(-4)*3=(-2)(-4)(3)=24

2. (-1)(-9)+5+10=9+5+10=24

上面#001既第1題唔記得先乘除後加減，所以錯左。

2008-10-31 16:35:30 補充：
應該咁講，上面#001既第1題漏左個括弧。

參考: ME

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Chun Hin

2008-11-01 9:10 pm

1.
[6+(-8)]x(-4)x3
=(6-8)x(-4)x3
=(-2)x(-12)
=24

2.
10-(-9)-5x-1
=10+9-(-5)
=19+5
=24

Hope I can help you.

參考: my maths knowledge

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Corolla Lee

2008-11-01 3:55 am

1.6 (-8)x(-4)x3
=6-8x(-4)x3
=-2x-4x3
=24

2.10-(-9) 5x1
=10 9 5x1
=24

參考: my

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o.....

2008-11-01 3:13 am

{6+(-8)}x(-4)x3
=(6-8)x(-4)x3
=(-2)x(-4)x3
=(+8)x3
=24

10-(-9)+5x1
=10+9+5x1
=19+5
=24

參考: me

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cho fu

2008-10-31 11:08 pm

6+(-8)x(-4)x3
=6-8x(-4)x3
=-2x-4x3
=24

10-(-9)+5x1
=10+9+5x1
=24

參考: me

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