## Basic College Mathematics (10th Edition)

Estimate 21 pounds Exact $21 \frac{5}{8}$ pounds
Estimate $(50 \times 4) - 69 - 77 - 33$ = $200 - 69 - 77 - 33$ = 21 Exact $(50 \times 4) - 68 \frac{1}{2} - 76 \frac{5}{8} - 33 \frac{1}{4}$ = $200 - 68 \frac{4}{8} - 76 \frac{5}{8} - 33 \frac{2}{8}$ = $199 \frac{8}{8} - 68 \frac{4}{8} - 76 \frac{5}{8} - 33 \frac{2}{8}$ = $131 \frac{4}{8} - 76 \frac{5}{8} - 33 \frac{2}{8}$ = $130 \frac{12}{8} - 76 \frac{5}{8} - 33 \frac{2}{8}$ = $54 \frac{7}{8} - 33 \frac{2}{8}$ = $21 \frac{5}{8}$