Simple calculation but many people do it wrong, can you solve this problem?

Given the calculation 9 – 9 ÷ 9 + 9 – 9 ÷ 9, players should find the best answer for this problem.

The above problem was shared by The Epoch Times in 2020. In your opinion, what is the correct answer to this question?

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Answer:

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9 – 9 ÷ 9 + 9 – 9 ÷ 9 =?
9 – 1 + 9 – 1 =
8 + 9 – 1 =
17 – 1 = 16