Question

Sophia pays a $19.99 membership fee for an online music store. a. If she buys two songs at a price of $0.99 each, what is the total cost of the songs and membership?

Answer 1

first, how much were her songs? It's two songs each, and their separate prize was 0.99:

total prize was 2*0.99=1.98

this gets added to the membership prize:

19.99+1.98=21.97

you can also calculate this by rounding all the numbers (20+1+1) and substracting the amount you rounded (three times one cent) - the result would be the same.