sakurauiky's answer to crystal's Primary 4 Maths Singapore question.

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sakurauiky
Sakurauiky's answer
34 answers (A Helpful Person)
1st
At first
J+P=$525

At first
P/J=1/4=3/12

In the end
P/J=7/12

7/12-3/12=4/12

140÷4=35
3+12=15
15×35=525

Can you notice that before N after
John is fixed
Got nothing changed
So try to align the denominator as 12
At first
P/J=1/4=3/12