Question

Simplify: $129-87+(10÷2\times 5)$

Answer 1

According to PEMDAS, we need to simplify the parentheses then exponent then divide, then multiply or divide(left to right) then add, and then subtract the numbers.
$129-87+10÷2\times 5$

Here, we can see that multipication and division are together, hence, we will solve both from left to right.

$=129-87+5\times 5=129-87+25$

Here, we can see that addition and subtraction are together, hence, we will solve both from left to right.
$=129-87+25=42+25=67$

$\therefore 129-87+(10÷2\times 5)=67$