Math

In math we have learned the order of operations. The order of operations is
BEDMAS. Here is an example and the explaining of Bedmas.

Brackets
Exponents
Divison
Multiplication
Addition
Subtraction

Example:
4 x (10-5) + 8-9
4 x 5 + 8 - 9
20 + 8 - 9
28 - 9
19