Difficulty: Easy
Correct Answer: +, =, -
Explanation:
Introduction / Context:We must choose, in order, three operations to replace the asterisks so that the resulting numerical statement is true.
Given Data / Assumptions:
Concept / Approach:Test each option quickly by substitution and normal evaluation.
Step-by-Step Solution: Option (b): 10 + 4 = 15 − 1 ⇒ 14 = 14 (true). Option (a): 10 × 4 = 15 + 1 ⇒ 40 = 16 (false). Option (c): 10 + 4 = 15 × 1 ⇒ 14 = 15 (false). Option (d): 10 − 4 × 15 = 1 ⇒ 10 − 60 = 1 (false).
Verification / Alternative check:Compute square roots first, then apply indicated operations; only (b) balances.
Why Other Options Are Wrong:They produce unequal LHS/RHS values.
Common Pitfalls:Altering the order of chosen operations or mis-evaluating square roots.
Final Answer:+, =, -
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