平均數!!!!
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 6:15 am
5x(4.6-0.5)
=5x4.1
=20.5//
=5x4.1
=20.5//
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-"
=(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.....
唔知係唔係.....
收錄日期: 2021-04-13 14:42:11
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071211000051KK04029