Sunday, June 6, 2010

Whole Number P5

Mdm Lek had 57 apples and oranges altogether.There were 3 fewer oranges than apples.She gave away half as many oranges as apples to her neighbours. She was left with twice as many oranges as apples.How many apples did she give away?

A [          ][3] )
O [          ]       ) 57

2 u --> 57 - 3 = 54
1 u --> 54 ÷ 2 = 27
A --> 27 + 3 = 30

    [][][3][][3]
A [][     ][     ] 30    A - O --> [      ] - [] = [3],
O [][][     ]      27   so redraw [     ] as [][3]

3 u --> 30 - 3 - 3 = 24  1 u  is different from the earlier 1 u
1 u --> 24 ÷ 3 = 8         If you like, you may use 1 su

30 - 8 = 22 apples

She gave away 22 apples.

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