Discussion
Which of the following interchanges in signs and numbers will make the given equation correct?
8 x 9 + 2 = 74
Answer: B
Correct answer: x and +, 8 and 2
Making both exchanges - the signs × and +, and the numbers 8 and 2 - turns the left side into \( 2 + 9 \times 8 \), which is \[ 2 + 72 = \mathbf{74} \]
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