Question

The expression
$129-87+\left[\right(10÷2\left)5\right]$ represents Ben’s monthly electricity bill. Help him solve the expression to find the bill amount (in $\$$).

• A. $\$68$
• B. $\$64$
• C. $\$65$
• D. $\$67$

Answer 1

The correct option is D $\$67$

Use PMDAS to solve the given expression and find Ben’s electricity bill amount.

We use the following steps to solve expressions using PMDAS.
a.Simplify the terms within the parentheses first.
b.Simply the terms with the multiplication -or division operator from left to right.
c.Perform all addition or subtraction operations from left to right.

$129-87+\left[\right(10÷2)\times 5]$

$=129-87+[5\times 5]$

$=129-87+25$

$=129-87+25$

$=42+25$

$=67$

Therefore, $129-87+(10÷2\times 5)=67$

Ben’s electricity bill amount is $\$67$.