Firdaus Bin Suhaimi's answer to Lee's Primary 4 Maths Singapore question.
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Draw out model of the outcome after J has given B.
Notice if you ignore the 40 B has more than K, there are 5 units of equal amount.
Find how much is each unit:
5units = 360-40 =320
1unit = 320 ÷ 5 = 64
So J now has 64 but before he gave B,
64+28= 92
J had 92 at the beginning.
Notice if you ignore the 40 B has more than K, there are 5 units of equal amount.
Find how much is each unit:
5units = 360-40 =320
1unit = 320 ÷ 5 = 64
So J now has 64 but before he gave B,
64+28= 92
J had 92 at the beginning.
Date Posted:
5 years ago
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