Shawn's answer to Heng Lee ing's Primary 5 Maths Singapore question.

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Shawn
Shawn's answer
110 answers (A Helpful Person)
1st
First you need to remove the price from the extra erasers so that the amount of erasers and pens bought would be the same. After that you can divide it by the price of 1E+1P since $9 is from equal number of pens and erasers.