Ei Kay Thari Pe's answer to Peter's Primary 4 Maths Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Ei Kay Thari Pe
Ei Kay Thari Pe's answer
5 answers (Tutor Details)
Please use guess and check to find a number of 20cent and 50cent coins that will add up to $8.50. Remember to make everything the same units, here we make everything from cents to dollars.
J
J
3 years ago
The better method and more efficient way for this question is the grouping concept.