Order of operation:
1 - Parenthesis and brackets ( ) { }
2 - Exponents and roots n3 √n
3 - Multiplication and division X ÷
4 - Addition and subtraction + -
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Parenthesis
Because if you did operations in an impermissible order, or violated laws of operations, then your solution to the equation is wrong.
partheses because that the first order of operation
solve the top and bottom first, as if each were in parentheses. Then Divide the numerator by the denominator
Solve the following by order of operations and explain your steps (10 x 5) + 25-10 / 2=