## Basic College Mathematics (10th Edition)

$5\times 4 \times 2 = 40$
$a \times b \times c =$ General formula for the answer 1. Multiply the first two numbers together ($a \times b$) $5\times 4 = 20$ 2. Multiply the previous number in #1 with the last number $((a \times b) \times c)$ $20 \times 2 = 40$