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Primary 3 | Maths
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Date Posted: 6 years ago
Views: 312
The total amount of $ will not change regardless the amount of 20 cents coins were exchanged for 10 cents coins. It can be deduced that the total amount of money is $2.80. For a Pri 3 kid to understand, I guess you can let your child to try guess and check method.
Let just take Muthu has 5 20 cents and 10 cents coins respectively and Sam has 7 20 cents and 10 cents coins respectively. From here deduce the total amount of $ they had. If the total amount of $ is larger than $2.80, reduce the number of 20 cents coins and vice versa. Do so until you get the right amount.
Let just take Muthu has 5 20 cents and 10 cents coins respectively and Sam has 7 20 cents and 10 cents coins respectively. From here deduce the total amount of $ they had. If the total amount of $ is larger than $2.80, reduce the number of 20 cents coins and vice versa. Do so until you get the right amount.
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done
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Use "Guess and Check" concept. =)
Date Posted:
6 years ago
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