一到文字題就總有幾條睇吾明，吾識做，請問英文的文字題，做時要否寫解題？
1. In a class of 40 students, 45% of them are boys and 55% of them are girls. What are the number of boys and girls respectively?
2. The temperature last night was 25'C(度）and it is 34'C(度）noon today. What is the percentage increase/ decrease in temperature?
請問以上的中文解釋是什麽和怎樣做，（如要解題，英文是用那部分的）
F.1 maths
2007-07-30 11:34 am
回答 (3)
2007-07-30 1:23 pm
✔ 最佳答案
第一題:一班有40個學生,45%係男,55%係女,計有幾多男及女
解法跟之前那位一樣
boy's no.=40x 45/100=18
girl's no.=40x 55/100=22
第二題
咋晚溫度25度攝氏,今天34度攝氏,計溫度的百分比增加或減少是多少
% increase/decrease= new reading 減 old reading 除 old reading 乘 100%
=34-25/25 x100%
=9/25 x100%
=+36%
因為是正數,所以是%increase
至於要唔要寫解題....一開始時可以試下寫,會方便你計
但其實做得多,睇得多,會慢慢習慣睇英文文字題
到時就可以慢慢減少寫解題
參考: 自己計的
2007-07-30 9:02 pm
1. 班裡共有40名學生, 當中45%是男同學,55%是女同學. 班上男同學和女同學的數見分別是多少?
No. of boys=40 x 45%
=40 x 0.45
=18
No. of girls=40 x 55%
=40 x 0.55
=22
2. 昨晚的氣溫是25'C, 而今天正午的氣溫是34'C. 氣溫上升/降低的百分比是多少?
The percentage of change=34'C - 25'C/25'C x 100%
=9/25 x 100%
=36%
Therefore the percentage of temperture is 36% increased
No. of boys=40 x 45%
=40 x 0.45
=18
No. of girls=40 x 55%
=40 x 0.55
=22
2. 昨晚的氣溫是25'C, 而今天正午的氣溫是34'C. 氣溫上升/降低的百分比是多少?
The percentage of change=34'C - 25'C/25'C x 100%
=9/25 x 100%
=36%
Therefore the percentage of temperture is 36% increased
2007-07-30 11:57 am
1) 40 x 45/100 = 18 boys
40 x 55/100 = 20 girls
2) 30-25 = 5. So, the percentage is INCREASE to:
5/25 x 100% = 20 %
40 x 55/100 = 20 girls
2) 30-25 = 5. So, the percentage is INCREASE to:
5/25 x 100% = 20 %
收錄日期: 2021-04-13 13:44:54
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070730000051KK00511