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Yahoo!奇摩知識+ - 分類問答 - 科學常識 - 投票中
Yahoo!奇摩知識+ - 分類問答 - 科學常識 - 投票中
5題數學不會算解出來給20點
May 25th 2013, 07:01

6.
設奶茶x杯
紅茶0.55x杯

x-0.55x=0.45x=2160
x=4800---奶茶杯數
4800*0.55=2640---紅茶杯數

得紅茶:2640杯,奶茶:4800杯

2.
(225,180)=45----最大的邊長
225/45=5
180/45=4
5*4=20---最少20張

得正方形邊長最大45cm,需要20張紙

7.
360*16/9(全部男生)+420*11/7(全部女生)=1100人

全部人1100人

3.
0:45+0:18=1:03
9:00-1:03=8:60-1:03=7:57

最慢於上午7點57分要出發

4.

五分之十二去除於1.5=五分之八公尺---全華長=1.6公尺
5.7m/1.6m=57/16

得57/16倍

參考資料: 小學生記憶

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