Interchange one pair of signs to make the equation true: 4 × 2 + 6 ÷ 2 − 12 = 2

Difficulty: Easy

Correct Answer: ÷ and x

Explanation:


Introduction / Context:
We must globally swap one listed pair of operators so that the equality holds with standard precedence.


Given Data / Assumptions:

  • Original: 4 × 2 + 6 ÷ 2 − 12.
  • Target: 2.


Concept / Approach:
Test each swap and evaluate.


Step-by-Step Solution:
Swap ÷ and × (Option A): becomes 4 ÷ 2 + 6 × 2 − 12.Compute: 4 ÷ 2 = 2; 6 × 2 = 12 → 2 + 12 − 12 = 2 (true).Other swaps yield values different from 2.


Verification / Alternative check:
Direct substitution confirms only Option A gives 2.


Why Other Options Are Wrong:
They produce non-equal outcomes after evaluation.


Common Pitfalls:
Forgetting that the swap applies to all occurrences of the two signs.


Final Answer:
÷ and x.

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