Follow the order of PEMDAS of operations:
- P - Parenthesis
- E - Exponents
- M - Multiplication
- D - Divisions
- A - Additions
- S - Subtractions
Multiply and divide (from left to right).
Apply the rule: (-a)*(b) = -a*b
(-3)(18) = -13 * 18 = -54
-54(-5) = 54 * 5 = 270
The answer is 270✅ .