Answer
estimate: 6
exact: $5\frac{1}{2}$
Work Step by Step
Estimate
Round each number'
$1\frac{7}{10}\approx2$
$3\frac{4}{5}\approx4$
Solve
$2+4=6$
Exact
Solve by rewriting mixed number as improper fractions. Use the least common multiple as the denominator.
$1\frac{7}{10}+3\frac{4}{5}=\frac{17}{10}+\frac{19}{5}=\frac{17}{10}+\frac{19\times2}{5\times2}=\frac{17}{10}+\frac{38}{10}=\frac{55}{10}=5\frac{5}{10}=5\frac{1}{2}$
