Problem
Estimate the amount of the tip by rounding the bill to the nearest dollar before calculating. \( 20 \% \) tip on a bill of \( \$ 29.77 \) The amount of the tip is approximately \( \$ \$ \)
Solution
Step 1 ：\( \text{Round } 29.77 \text{ to nearest dollar: } 30 \)
Step 2 ：\( \text{Calculate } 20\% \text{ of } 30 : 0.20 \times 30 \)
Step 3 ：\( \text{Tip amount: } \$ 6 \)
