Answer
$13\frac{7}{10}$
Work Step by Step
$6\frac{3}{5}$ + $7\frac{1}{10}$
= $6\frac{6}{10}$ + $7\frac{1}{10}$
(10 is the least common denominator)
= $6$ + $7$ + $\frac{6}{10}$ + $\frac{1}{10}$
(adding whole part separately and fractional part separately)
= $13$ + $\frac{6 + 1}{10}$
= $13$ + $\frac{7}{10}$
= $13\frac{7}{10}$
The estimate was 14, so the exact answer of $13\frac{7}{10}$
is reasonable.
