The expression 20 + 20 × 0 − 1 must be solved using the correct order of operations.
First, complete the multiplication:
20 × 0 = 0
Now the equation becomes:
20 + 0 − 1
Solve from left to right:
20 − 1 = 19
The correct answer is 19.
Many people get this wrong because they add before multiplying.
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