Exercise 65 Page 117

According to the order of operations, division and multiplication are evaluated first, while addition and subtraction are evaluated last. For the given expression, this means dividing and multiplying terms completely before adding it to the first term.

$$\begin{array}{c}3+16÷8\cdot 5\end{array}$$

For this, we must remember to divide first, multiply next, and finally calculate the sum of $3$ and the result of the multiplication.

Operation	Before Simplification	After Simplification
Calculate quotient	$3+16÷8\cdot 5$	$3+2\cdot 5$
Multiply	$3+2\cdot 5$	$3+10$
Add terms	$3+10$	$13$

The expression equals $13.$

Alternative Solution

Using a Calculator

We can also evaluate this expression using a calculator. To do so, type it as shown below.