Learn the rules for evaluating mathematical expressions
When an expression has multiple operations, follow PEMDAS:
Parentheses first Exponents second Multiplication and Division (left to right) Addition and Subtraction (left to right)
"Please Excuse My Dear Aunt Sally"
Multiplication first:
NOT ❌
Left to right (same level):
Left to right (same level):
❌ Forgetting that M/D and A/S go left to right ❌ Doing addition before multiplication ❌ Forgetting to apply exponents before multiplication