To solve the multiplication of three numbers, we multiply them sequentially. Start by multiplying the first two numbers, then multiply the result by the third number. Pay attention to the signs: multiplying two negative numbers results in a positive number, and multiplying a positive number by a negative number results in a negative number.
Step 1: Multiply the First Two Numbers
To solve the expression \((6)(-3)(-5)\), we start by multiplying the first two numbers:
\[
6 \times (-3) = -18
\]
Step 2: Multiply the Result by the Third Number
Next, we multiply the result from Step 1 by the third number:
\[
-18 \times (-5) = 90
\]