Answer:
Explanation:
42÷(2+5)•3 =
first we deal with the parentheses
42÷7•3
now we solve left to right
42÷7•3 = 6•3 = 18
The order of operations is:
Solve the parentheses first. Apply the same set of rules to whatever is inside the parentheses).
Solve multiplication and division - go from the left to right.
Solve addition and subtraction - go from left to right.
And you have the answer!
In this problem we only had division, multiplication and parentheses with addition inside.
Also, in the future you'll probably need to update the above rules with powers, roots and other things.