Should an estimate or the exact answer be calculated? Then do the appropriate calculation.

Mr. Montgomery received a $20 gift card for a coffee shop. He made three purchase of $1.65 each and two more purchases of $3.95 each. How much money was then left on his card?

A.

An estimate is sufficient. There is about $6.00 left on the card.

B.

The exact answer is needed. There is $7.15 left on the card.