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primary 6 | Maths
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Ratio
Date Posted: 7 years ago
Views: 410
20¢ x 19 = 380¢
380¢ + 130¢ = 510¢
Difference 50¢ - 20¢ = 30¢
No of 50¢ coins
= 510¢ ÷ 30¢
= 17
No of 20¢ coins
= 17 + 19
= 36
Total amount
= 17 x 50¢ + 36 x 20¢
= 850¢ + 720¢
= $15.70
380¢ + 130¢ = 510¢
Difference 50¢ - 20¢ = 30¢
No of 50¢ coins
= 510¢ ÷ 30¢
= 17
No of 20¢ coins
= 17 + 19
= 36
Total amount
= 17 x 50¢ + 36 x 20¢
= 850¢ + 720¢
= $15.70
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This is the answer.
Date Posted:
7 years ago
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