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One easy way to think of absolute value is the distance it is from zero. To do that, a number line comes in handy. Watch and learn.

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Intro to order of operations (video) | Khan Academy

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This example shows the steps and clarifies the purpose of order of operations: to have ONE way to interpret a mathematical statement.

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The order of operations tells us the order to solve steps in expressions with more than one operation. First, we solve any operations inside of parentheses or brackets. Second, we solve any exponents. Third, we solve all multiplication and division from left to right. Fourth, we solve all addition and subtraction from left to right.