plz help me!!!!Maths!!

2007-02-26 6:48 pm
1make one cake,need 麵粉4/5盒,if make a 3/4 cake,need how many 麵粉???
2.16&24 all the 公因數
3.把8又7/9化作小數,取至小數點後2位!
THANKS!
更新1:

tszying18,can u in nub1列式???

回答 (2)

2007-02-26 6:57 pm
✔ 最佳答案
1 cake / 4/5盒 = 3/4 cake / x 盒

(4/5)(3/4) = x

x = 3/5 盒
-------------------------------------------
1 x 16 = 16
2 x 8 = 16
4 x 4 = 16

1 x 24 = 24
2 x 12 = 24
3 x 8 = 24
6 x 4 = 24
therefore, 公因數 are 1, 2, 4, 8
-------------------------------------------
8又7/9 = 8 + 0.78 = 8.78
2007-02-26 7:01 pm
小朋友 上学要听书呀

哥哥就帮你一次 下次你自己来做吧

1. 4/5可以做一cake 那3/4cake是要少过4/5吧
所以是 4/5X3/4=3/5盒了

2. 2,4,8

3. 8又7/9 是 8+7/9 所以是8+0.77777=8.78

2007-02-26 11:02:34 補充:
2. 噢 对不起 应该是 1,2,4,8


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