數學問題...英文 - Ans.fyi 參考答案

數學問題...英文

用戶222508

2008-01-17 1:31 am

1) A amn bought some oranges, he found that 24 oranges were bad, which is 3% of all the oranges he bought. How many oranges did he buy?

2) In a certain school, there are 546 girls, that is 52% of the total number of pupils in the school. How many pupils are there in school?

3) 25% of a piece of ice has melted, the remaining ice weighs 39kg, how heavy is the piece of ice?

回答 (1)

[匿名]

2008-01-17 7:17 am

✔ 最佳答案

1. A man bought some oranges, he found that 24 oranges were bad, which

is 3% of all the oranges he bought. How many oranges did he buy?

Sol:

24 ÷ 3%

＝ 24 ÷ 0.03

＝ 800

Ans: He bought 800 oranges

2. In a certain school, there are 546 girls, that is 52% of the total number of

pupils in the school. How many pupils are there in school?

Sol:

546 ÷ 52%

＝ 546 ÷ 0.52

＝ 1050

Ans: 1050 pupils

3. 25% of a piece of ice has melted, the remaining ice weighs 39kg, How

heavy is the piece of ice?

Sol:

39 ÷ ( 1 － 25% )

＝ 39 ÷ 0.75

＝ 52

Ans: 52 kg

參考: 數學小頭腦

👍 0 👎 0