狼姥姥每日一题 - 数学 Problem solving （25-6-2012）:D :D

狼姥姥

18-6-12

If a bottle and it's cork costs $1.10 and the bottle costs $1 more than the cork, how much doesnthe cork cost?

直面异议

这种题对绝大多数的孩子好无意义.多花点时间，学语文。

直面异议

。

狼姥姥

20-6-12
Two questions today!!!!

Annie, Blake and Cara collects stamps. Annie and Blake has 80 stamps together. Annie and Cara has 106 stamps altogether. Blake and Cara has 94 stamps altogether. How many stamps does Annie Blake And Cara have altogether.

Bob took eight 10cent and 20cent coins from a piggy bank. He had $1 altogether, how many 10cent coins did bpBob pick out.

springbok

狼姥姥 发表于 2012-6-20 19:31
20-6-12
Two questions today!!!!

Answer:
1.  80 + 106 + 94 = 280 (all stamps counted twice together),  so: 280 / 2 = 140 stamps

2.  20cents   10 cents
        1              7   ( 90 cents)
        2              6    ( $1.00)
        3              5    ($1.10)
        4              4    ( $ 1.20)
        5              3   ( $ 1.30)

SO:  six 10cent coins.

狼姥姥

21-6-12

6xx5 is a multiple of 9. the two "x' represent the same digit. what does "x" represent?

狼姥姥

25-6-12
when jenny was sent to get change for the parking metre, she changed a dollar into 16 coins, consisting of 5cent and 10cent pieces. how many coins of each kind were in the change?

good luck!!! get your minds ticking!