The expression 10 + 10 ÷ 10 − 1 must be solved using the correct order of operations.
Complete the division first:
10 ÷ 10 = 1
The equation now becomes:
10 + 1 − 1
Calculate the remaining operations from left to right:
10 + 1 − 1 = 10
The correct answer is 10.
Many people get a different result because they add the first two numbers before completing the division.
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