Integer expressions are simply a string of integers you must evaluate to come up with a single number as your answer. Integers are numbers that can be written without a fraction or anything following the decimal point. Thus, when solving integer expressions, you won't need to deal with complicated numbers. Solving integer expressions is a logical, step-by-step process, relying on the order of operations: Parentheses, Exponents, Multiplication and Division, Addition and Subtraction. Some people like to remember this by the acronym PEMDAS, or by thinking of the letters as standing for "Please Excuse My Dear Aunt Sally."
Instructions
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1
Simplify any expressions in parentheses you see. You no longer have to write the parentheses in later steps.
Example:
4 * (10 - 5) - 21 / 3 + 2^2
4 * 5 - 21 / 3 + 2^2
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2
Simplify any exponents.
Example:
4 * 5 - 21 / 3 + 2^2
4 * 5 - 21 / 3 + 4
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3
Simplify any multiplication or division. Do not prioritize one over the other; instead, work from left to right in the order that you find them.
Example:
4 * 5 - 21 / 3 + 4
20 - 21 / 3 + 4
20 - 7 + 4
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4
Simplify any addition or subtraction. Do not prioritize one over the other; instead, work from left to right in the order that you find them.
Example:
20 - 7 + 4
13 + 4
17 (answer)