Answer
Exact: $5\frac{1}{5}$
Estimate: $6$
Work Step by Step
Exact:
$1\frac{5}{8}\times3\frac{1}{5}$
$=\frac{13}{8}\times\frac{16}{5}$
$=\frac{13}{1}\times\frac{2}{5}$
$=\frac{26}{5}$
$=5\frac{1}{5}$
Estimate:
$1\frac{5}{8}\times3\frac{1}{5}$
$\approx2\times3$
$=6$