AC Lim's answer to Toto's Primary 5 Maths Whole Numbers Singapore question.
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Hope you understand
Date Posted:
5 years ago
If you have learned algebra,
5s+2p=320 —-(1)
Given 6s=4p
Divide 2, 3s=2p—(2)
Substitute 2p to (1)
5s+3s=320
8s=320
1s=40
(2), 2p=3x40
1p=60
Total 1s+1p= 40+60=100.
5s+2p=320 —-(1)
Given 6s=4p
Divide 2, 3s=2p—(2)
Substitute 2p to (1)
5s+3s=320
8s=320
1s=40
(2), 2p=3x40
1p=60
Total 1s+1p= 40+60=100.
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