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Evaluate: 16 + 18 ÷ 3 - 3 × 3
13
15
12
16
13
Use BODMAS rule strictly. Perform division first (18/3=6), then multiplication (3*3=9), then addition and subtraction left to right (16+6-9).
Mathematical expression: 16 + 18 ÷ 3 - 3 × 3
BODMAS=Bracket→Of→Division→Multiplication→Addition→Subtraction
Use BODMAS rule strictly. Perform division first (18/3=6), then multiplication (3*3=9), then addition and subtraction left to right (16+6-9).
Many students subtract 3 from 18 before dividing (15 ÷ 3) or multiply before dividing without checking sequence, or calculate 16 + 18 first, violating the priority order.
Divide first
According to the BODMAS rule, division takes precedence over addition, subtraction, and multiplication.
18÷3=6
Multiply second
Perform the multiplication step following the division.
3×3=9
Add and subtract
Substitute values back into the expression: 16+6−9. Then process addition and subtraction from left to right.
16+6−9=22−9=13
A is correct because the result of the expression following the BODMAS rule is 13.
This concept is foundational for solving complex algebraic expressions and data interpretation sets where calculation order is critical.
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