Question

What is 9x9 + 9 - 9 plus 99-9 =

Answer 1

171

Explanation:

Recall order of operations.

PEMDAS = parentheses, exponents, multiply, divide, add, subtract

You can treat it like this to make it easier:

((9x9) +9) -9 + (99-9)

(81 + 9) - 9 + (90)

90 - 9 = 81

81 + 90 = 171