AC Lim's answer to Bokcute's Primary 6 Maths Ratio Singapore question.
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Another working, hope this helps.
Date Posted:
2 years ago
Use ratio method, hope she can understand. This method, we look for what remain unchanged. For this question, we notice that total amount of money remain same as changed 50¢ coins with same value to 20¢ coins, value still 126
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