median
don steward
mathematics teaching 10 ~ 16
Sunday, 19 December 2010
trading
lollies, bars and chews
(1)
3 chews = 2 bars
5 lollies = 7 bars
how many chews is 1 lolly worth?
(2)
5 bars = 4 chews
9 lollies = 6 chews
how many lollies per bar?
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