Once again, I come to quibble.
1 + 10 x 2 = 21
...so far, so good
1 + 10 = 11 x 2 = 22
...hmm...that one's not an equation. The two equal signs are the giveaway.
The proper way to express the second one is:
1 + 10 = 11
2 x 11 = 22
Just remember that 1 + 10 x 2 = 21 no matter how you slice it.
If you really want to get 22, you need:
(1 + 10) x 2 = 22
A result of 22 requires parentheses....OOO baby baby.
PEMDAS (parentheses, exponents, multiplication, division, addition, subtraction)