Question

Determine the value of the expression to open gate C:

$\left[\right(16÷8)\times 5]÷2\times 3+1+7\times 10$

Answer 1

According to the PEMDAS rule, we must start with parentheses for solving the expression.

As there are more than one pair of parentheses, we must solve the innermost parentheses first.

$\left[\right(16÷8)\times 5]÷2\times 3+1+7\times 10$
$=[2\times 5]÷2\times 3+1+7\times 10$

Solving the next parentheses,
$=10÷2\times 3+1+7\times 10$

Now, we have division, multiplication and addition operations.
We go for division and multiplication, starting from the left.

$10÷2\times 3+1+7\times 10$
$=5\times 3+1+7\times 10$
$=15+1+7\times 10$
$=15+1+70$

Finally, we perform the addition operations, starting from left.

$15+1+70$
$=16+70$
$=86$

$\therefore 86$ is the value of the given expression.