Lesson 1.1 How do you evaluate and write variable expressions? To evaluate, you substitute a number for the letter, perform the operation and simplify. To write, you translate words and phrases to operations and variables.

Lesson 1.2 How do you use powers to describe repeated multiplication? A power is a way to write a repeated multiplication using a base and an exponent. The exponent tells us the number of times the base is used.

Lesson 1.3 How do you use the order of operations to evaluate expressions? The order of operations is a set of rules that tells the order in which to complete operations when there’s more than one in an expression.

Lesson 1.4 How do you compare and order integers? To compare and order integers, you use a number line. Negative numbers come before positive numbers.

Lesson 1.5 How do you add integers? You can use a number line. You can use the rules: To add integers with the same sign, keep the sign and add the numbers. To add integers with different signs, subtract the smaller number from the larger number and keep the sign of the bigger number.

Lesson 1.6 How do you subtract integers? Subtracting is the same as adding the opposite. Subtracting a negative number becomes an addition.

Lesson 1.7 How do you multiply and divide integers? To multiply and divide integers with: The same signs, your answer is positive. Different signs, your answer is negative.

Lesson 1.8 How do you identify and plot points in a coordinate plane? To identify and plot points in a coordinate plane, you read the x-coordinate first to move left or right. Then you read the y-coordinate second to move up or down.