Fatima wants to add a 20% tip on a $56 restaurant bill.
Which strategy can she use to find a reasonable estimate for the tip?


1) Round 56 to 60, find 10%, then double it.

2) Round 56 to 50, find 10%.

3) Round 56 to 60, then find 50%.

4) Round 56 to 60, then find 10%.