AC Lim's answer to Azfer's Primary 5 Maths Rate & Ratio Singapore question.
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Hope this helps
Date Posted:
4 years ago
Ihi hi s this under guess and check ?
May I ask why take 2 -1 ? Thanks
Assumption method.
Free gift of washcloths = 1
Free gift with pacifier = 2
The difference of free gift = 2-1 = 1
Free gift of washcloths = 1
Free gift with pacifier = 2
The difference of free gift = 2-1 = 1
You can use guess and check too.
FYI, Guess & check and assumption method are correlation. If can use guess and check, normally can solve using assumption method too.
FYI, Guess & check and assumption method are correlation. If can use guess and check, normally can solve using assumption method too.
Can we exchange number ?
Do you mean, if all are pacifiers?
Yes you can.
If assumed all are pacifier, total gift = 5×2 =10
Gift extra = 10 - 8 = 2
Therefore, customer with washclothes = 2÷1 = 2.
Yes you can.
If assumed all are pacifier, total gift = 5×2 =10
Gift extra = 10 - 8 = 2
Therefore, customer with washclothes = 2÷1 = 2.
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