ORDER OF OPERATIONS: Problem 3

Rule 20:

Multiplication and division must be completed before addition and subtraction.

Problem 3: Calculate .

Answer: The answer is -11.

Solution:

The problem contains addition and subtraction. Solve it was you would if you were entering the numbers into your calculator. The calculator will go through the following steps:

Solution 2:

You could also solve the problem by grouping each pair of number. The problem

could be written and again as .

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