annissa chan's answer to Alice's Primary 3 Maths Singapore question.
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since books were exchanged between one another, total number of books remains unchanged at 400.
By model method, Muthu would have 4 units at the end, and Ali 1 unit only, both of them totaling 5 units.
Hence, 1 unit = 400/5 = 80
Muthu’s books in the beginning = 4 units - 290 = 80x4 - 290 = 30
hope this helps:))
By model method, Muthu would have 4 units at the end, and Ali 1 unit only, both of them totaling 5 units.
Hence, 1 unit = 400/5 = 80
Muthu’s books in the beginning = 4 units - 290 = 80x4 - 290 = 30
hope this helps:))
Date Posted:
3 years ago
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