Siow Lin Hoe's answer to Norynne's Primary 5 Maths Rate & Ratio Singapore question.
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M + S = 139
If M=70, then S=69
If M=71, then S=68
....
....
IF M = 79, then S = 60
So,
M can be 70~79
S can be 69~60
If M=70, then S=69
If M=71, then S=68
....
....
IF M = 79, then S = 60
So,
M can be 70~79
S can be 69~60
Date Posted:
4 years ago
Thank you so much, sir!
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