How to calculate expression (provide examples)

Answer 1

To calculate an expression, you need to follow the order of operations, which is also known as the "PEMDAS" rule.

1. Parentheses first: Perform all calculations inside parentheses.
2. Exponents (ie Powers and Square Roots, etc.)
3. Multiplication and Division (from left to right)
4. Addition and Subtraction (from left to right)

Here are some examples:

1) 5 + 6 ÷ 2 x 4
First, we need to perform the division, so 6 ÷ 2 = 3.
Then, we need to multiply 3 x 4 = 12.
Finally, we add 5 to 12 to get the answer: 17.

2) (4 + 6) x 2 - 8
We need to start with the parentheses, solving 4 + 6 = 10.
Then, we multiply 10 x 2 = 20.
Finally, we subtract 8 from 20 to get the answer: 12.

3) 3² x 2 - 7
We start with the exponent, solving 3² = 9.
Then, we multiply 9 x 2 = 18.
Finally, we subtract 7 from 18 to get the answer: 11.