雨后彩虹合唱 华 师大:小学数学题目(英文版)

来源:百度文库 编辑:高考问答 时间:2024/05/04 16:40:21
A fruit seller had some fruits .3/5 of the fruits were apples and the rest were oranges.He sold 2/3 of the apples and 1/4 of the oranges.He had 40 apples and oranges left.

(a)How many apples did he sell altogether?

(b)How many fruits did he have at first?

一个水果商有若干水果,水果中的3/5是苹果剩下的是桔子,他卖了苹果的2/3桔子的1/4。他仍有苹果和桔子40个,
问他总共卖了多少苹果
问他原先总共有多少水果
总共有水果:
40/{3/5 *(1-2/3) +(1-3/5)*(1-1/4)}=80
苹果有:80*3/5=48
卖了的苹果:48*2/3=32
所以
(a)32
(b)80

at first 共有80个 里面有48个apple,和32个orange!卖了32个apple,8个orange~~~呵呵:)

a 32
b 80
一开始理解错了拉