平均數!!!!

2007-12-12 6:04 am
1:小康5人打算合資買餅乾,每人平均要付4.6元,小康發現如果到德昌糖果店購買,每人可少付0.5元,在德昌糖果店買餅乾要多少元?

回答 (8)

2007-12-12 6:14 am
✔ 最佳答案
原價係
4.6X5=23元
每人少付0.5元,有5人,即
23-0.5X5=20.5元
所以要20.5元。

列一總式:
1. (慢)
4.6X5-0.5X5
=23-2.5
=20.5

2. (快)
5X(4.6-0.5)
=5X4.1
=20.5

Hope can help you!!!
參考: me
2007-12-12 11:15 pm
20.5元!!
參考: me
2007-12-12 6:15 am
5x(4.6-0.5)
=5x4.1
=20.5//
2007-12-12 6:12 am
德昌糖果店買餅乾要:
(4.6-0.5)x5
=4.1x5
=20.5元
參考: 自己
2007-12-12 6:11 am
答案:24.5
參考: me
2007-12-12 6:11 am
將4.6-0.5咪計到啦!!
參考: me
2007-12-12 6:11 am
(4.6x5-5x0.5)/5
=(23-2.5)/5
=20.5/5
=4.1

在德昌糖果店買餅乾要4.1元!!

2007-12-11 22:39:22 補充:
4.1元系平均要付的$..但4.1x5=20.5元就系德昌糖果店買餅乾要的$-口-"岩岩搞錯左tim._."吾h0意思-v-"
2007-12-12 6:10 am
(5×4.6-0.5)×5

唔知係唔係.....


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