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According to the order of operations, we first solve the exercise within parentheses:
Now we solve the rest of the exercise:
\( 100-(30-21)= \)
The order of operations (PEMDAS) tells us the correct sequence! Parentheses come first, so must be solved before subtraction, even though subtraction appears first when reading left to right.
Parentheses, Exponents, Multiplication, Division, Addition, Subtraction. This gives us the correct order to solve mathematical expressions!
Solve all parentheses first, working from the innermost ones outward. Each set must be completed before moving to other operations.
After getting your answer, substitute it back or re-solve using the order of operations. For , double-check: parentheses first gives 3, then ✓
Yes! If the number being subtracted is larger than the first number, you'll get a negative result. Always follow the order of operations regardless of whether your answer is positive or negative.
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