Evaluate: 9 + 3 + 7 + 2 − (9 + 1).

Given data

• Expression: 9 + 3 + 7 + 2 − (9 + 1)

Concept / Approach

• Apply bracket first (BODMAS/PEMDAS), then perform addition and subtraction left to right.

Step-by-step calculation

Inside brackets: (9 + 1) = 10Outside sum: 9 + 3 + 7 + 2 = 21Result: 21 − 10 = 11

Common pitfalls

• Dropping the parentheses or mis-adding 9 + 3 + 7 + 2.

Final Answer

11