Middle Grades Math: Addition and Subtraction of Rational Numbers: Part 2

Objectives

• Students will represent signed mixed numbers and the results of the addition and subtraction of signed mixed numbers on a number line.
• Students will understand subtraction of mixed numbers as adding the additive inverse.

Vocabulary

• rational number
• equivalent fractions
• mixed numbers

About the Lesson

This lesson involves representing addition and subtraction of signed mixed numbers on a number line for a randomly generated target sum or difference.
As a result, students will:

• Represent addition and subtraction of signed mixed numbers on a number line.
• Calculate sums and differences, and use the TI-Nspire to check the accuracy of their calculations.