GWD 10-30

[briandragon]

Q30:
Joanna bought only $0.15 stamps and $0.29 stamps.
How many $0.15 stamps did she buy?

(1) She bought $4.40 worth of stamps.
(2) She bought an equal number of $0.15 stamps and $0.29 stamps.

答案給A

爲何不可以選D~~???

[iamger0730]

選項B
She bought an equal number of $0.15 stamps and $0.29 stamps.

他沒有給價錢的限制

所以不知到總共買了多少個!!!

他可以買10個$0.15 stamps and 10個$0.29 stamps.
也可以買20個$0.15 stamps and 20個$0.29 stamps.

希望我有幫到忙!!!

[briandragon]

感謝