Tzu's answer to ST's Primary 5 Maths Whole Numbers Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Tzu
Tzu's answer
5 answers (A Helpful Person)
1st
This question requires us to work backwards. To find how much Fiona has at first, we need to give back the $800 to Ethan. After that we can find Ethan's amount by taking the total amount - Fiona's amount.