which is the best estimate of $left(-\frac{3}{5}\right)left(17\frac{5}{6}\right)$?\n-18\n-9\n9\n18

which is the best estimate of $left(-\frac{3}{5}\right)left(17\frac{5}{6}\right)$?\n-18\n-9\n9\n18
Answer
Explanation:
Step1: Round the numbers
Round $-\frac{3}{5}$ to $- 1$ and $17\frac{5}{6}$ to $18$.
Step2: Multiply the rounded - numbers
$(-1)\times18=-18$.
Answer:
-18