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Primary 4 | Maths
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Must use model diagrams to solve. How to solve?
Date Posted: 5 years ago
Views: 236
Mary got 1/5 of the coins. Means 1 unit out of 5 units. So draw one unit for Mary.
Total = 5 units.
Jane got 3 more than Mary. So Jane is one unit + 3 coins
So Mary + Jane
= 2 units + 3 coins
Sylvia got 12 coins.
So Sylvia = total - Mary - Jane
= 5 units - 2 units - 3 coins
= 3 units - 3 coins
3 units - 3 = 12 coins
So 3 units = 12 + 3 = 15
1 unit = 15 ÷ 3 = 5 coins
Total number of coins
= 5 unit
= 5 x 5 coins
= 25 coins
Total = 5 units.
Jane got 3 more than Mary. So Jane is one unit + 3 coins
So Mary + Jane
= 2 units + 3 coins
Sylvia got 12 coins.
So Sylvia = total - Mary - Jane
= 5 units - 2 units - 3 coins
= 3 units - 3 coins
3 units - 3 = 12 coins
So 3 units = 12 + 3 = 15
1 unit = 15 ÷ 3 = 5 coins
Total number of coins
= 5 unit
= 5 x 5 coins
= 25 coins
Thank you, J. I can understand your explanation.
Welcome, by the way slight error in the last step, please check the edited answer above
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Date Posted:
5 years ago
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