Question

How do you evaluate `16 ÷ 4 * 2 - 7`?

Answer 1

Use PEMDAS:

`16-:4*2-7 = 16-:4*2-7 = 4*2-7 = 8-7 = 1`

Explanation:

Use the PEMDAS mnemonic to provide the order of application of operations:

Parentheses
Exponents
Multiplication & Division
Addition & Subtraction

We have no parentheses, exponents or addition to process, so start with multiplication and division, then subtraction:

`color(red)(16-:4)*2-7 = color(red)(4*2)-7 = color(red)(8-7) = 1`