maths

2013-07-15 9:19 pm
10/20%=??

60*40%=??

47%+12=??

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回答 (2)

2013-07-16 8:37 am
✔ 最佳答案
10/20% = 10/0.2 = 50

60*40% = 60*0.4 = 24

47% + 12 = 0.47 + 12 = 12.47

21.7/100 = 21.7%

0/100 = 0%

4(11/100) = 44/100 = 44%

100%/100 = 1/100 = 1%

220%/100 = 2.2/100 = 2.2%

13.2%/100 = 0.132/100 = 0.132%
參考: 我是全職數學補習老師
2013-07-15 9:58 pm
1) 10/20%
= 10/0.2
= 50

2) 60*40%
= 60*0.4
= 24

3) 47%+12
= 0.47+12
= 12.47

4) 21.7/100
= 0.217

把0.217化為百分比:
0.217*100%
= 21.7%

5) 因為 0/100 = 0
所以 0*100% =0%

6) 4(11/100)
= 4(0.011)
= 0.044

把0.044化為百分比:
0.044*100%
= 4.4%
參考: 自己


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