Question

Simplify the expression 4+18÷2-1

Answer 1

12.

Explanation:

Using the order of operations (PEMDAS) the division is done first:

4 + 18 / 2 - 1

= 4 + 9 -1

= 13 - 1

= 12.

Answer 2

12

Explanation:

Following the order of operations, division is performed before addition/ subtraction, thus

4 + 18 ÷ 2 - 1

= 4 + 9 - 1 ← performing the division

Evaluate from left to right

= 13 - 1 = 12