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.
any short cut to get answer is A, besides do all the calculation using trial and error?
[此贴子已经被作者于2005-2-7 2:23:05编辑过] |