This math puzzle looks simple, but the order of operations changes everything.
The equation is:
10 − 10 × 10 + 10
Multiplication comes first:
10 × 10 = 100
Now calculate from left to right:
10 − 100 + 10
= −90 + 10
= −80
It is easy to get a different result if you simply work from left to right without doing the multiplication first.
Answer: −80
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