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Primary 4 | Maths
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Date Posted: 9 months ago
Views: 143
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Guess and check method
Date Posted:
9 months ago
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Given X is assumed to be the total number of friends, in 8(X-1) + 4, you need to minus 1 from X because the last friend only received 4 stickers, hence Jane had to top up 4 stickers for the last friend. Another way of looking at it is, only the first (X-1) friends received 8 stickers each, and the last friend received the remaining 4 stickers.
Date Posted:
9 months ago
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