Wednesday, September 29, 2010

Whole Number P6

Mrs Jones has some almond and butter cookies.If she packs an almond cookie with a butter cookie,there will be 60 butter cookies left.If she packs every 2 almond cookies with 3 butter cookies,there will be 50 almond cookies left.How many cookies does she have in all?



A [                                ]
B [                                ][60]


                                <- 1u ->
A [           ][           ][50]
B [           ][           ][           ]

A [          ][           ][50]
B [          ][           ][50][60]
                              <- 1 u ->

1 u --> 50 + 60 = 110

5 u --> 5 x 110 = 550

550 + 50 = 600 cookies

She has 600 cookies.

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