Evaluating Expressions with Integers

Front

What is an integer?

Back

An integer is a whole number that can be positive, negative, or zero. Examples include -3, 0, and 5.

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting numbers for variables and performing the operations.

Front

What is the order of operations?

Back

The order of operations is a set of rules that dictates the sequence in which calculations are performed: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right). Often remembered by the acronym PEMDAS.

Front

How do you add two integers with the same sign?

Back

When adding two integers with the same sign, add their absolute values and keep the common sign. For example, -4 + -3 = -7.

Front

How do you add two integers with different signs?

Back

When adding two integers with different signs, subtract the smaller absolute value from the larger absolute value and take the sign of the integer with the larger absolute value. For example, 5 + -3 = 2.

Front

What is the result of -7 + 4?

Back

-7 + 4 = -3.

Front

What is the result of -5 - 3?

Back

-5 - 3 = -8.

Front

What is the result of 6 - 9?

Back

6 - 9 = -3.

Front

What is the result of -2 + -6?

Back

-2 + -6 = -8.

Front

What does it mean to multiply integers?

Back

Multiplying integers involves finding the product of two whole numbers. The product of two integers with the same sign is positive, while the product of two integers with different signs is negative.