數學3題請答 thx

2009-12-22 6:21 pm

1. 2y+2=4y-18, y=??

2.100與100%相差多少??

3.哥哥有100枚郵票,其中36%是日本郵票,他有日本郵票多少枚??

請大家幫一手 thx

回答 (6)

2009-12-22 6:29 pm

✔ 最佳答案

1. 2y+2=4y-18
2y = 2+18
y = 20/2 = 10

2. 100%=1
so 相差= 100-1 = 99

3. 100* 36%= 36

參考: me

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2009-12-26 6:35 pm

1. 2y + 2 = 4y - 18
2+ 18 = 4y - 2y
20 = 2y
y = 10

2. 100 - 100%
= 100 - 100/100
= 100 - 1
= 99

3. 100 x 36%
= 100 x 36 / 100
= 36
okay!

參考: 我

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2009-12-23 2:18 am

1) 18+2=4y-2y
20=2y
y=10

2) 100=100
100%=1
so 100-1=99

3) 100*(36/100)
100*0.36
=36

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2009-12-22 9:05 pm

1.2y+2=4y-18
2+18=4y-2y
20=2y
y= 10

2. 100%=1
所以相差=
100-1 = 99

3. 100* 36%= 36

參考: myself

👍 0 👎 0

2009-12-22 6:30 pm

1. 2y + 2 = 4y - 18
2+ 18 = 4y - 2y
20 = 2y
y = 10

2. 100 - 100%
= 100 - 100/100
= 100 - 1
= 99

3. 100 x 36%
= 100 x 36 / 100
= 36

希望幫到你 :)

參考: me

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2009-12-22 6:30 pm

1. 2y+2=4y-18
2y=20
y=10

2.100與100%相差 = 100

3.哥哥有100枚郵票,其中36%是日本郵票,他有日本郵票 = 36

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