Hey there, number enthusiasts, math whizzes, and anyone up for a mind – blowing challenge! Brace yourselves for a problem that’s not just another run – of – the – mill equation. This is a brain – teaser so intense that only true math geniuses—those with lightning – fast mental calculations and an uncanny knack for numbers—can crack it without relying on a calculator!

So, roll up your sleeves, clear your mind, and get ready to embark on this epic mathematical adventure. The challenge is here, waiting for you to accept it. Are you ready to show the world what you’re made of and join the ranks of the math geniuses? Let the numbers do the talking!
Ready to see the answer?
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Answer:
- According to the order of arithmetic operations, calculate multiplication and division first:
- Multiplication: 10×10=100.
- Division: 10÷10=1.
At this point, the original expression becomes 100−1+10.
- Then calculate addition and subtraction:
- Calculate from left to right. 100−1=99, 99+10=109.
So, 10×10−10÷10+10=109.