Education Technology

Adding Ratios

Activity Overview

This activity allows students to reason about ratio tables, which helps their understanding of what a ratio describes in a context and what quantities in equivalent ratios have in common.

About the Lesson

This TI-Nspire™ lesson  has students continue their investigation of ratios. They build upon their knowledge that ratios represent the relationship between two (or more) related quantities. As one of the quantities increases or decreases by a factor, so does the other. Because the values in a ratio are quantities, they can be combined to form a new ratio.

Prior to working on this lesson, students should understand:

  • understand how to find the unit rate;
  • be able to distinguish situations that involve proportional relationships from those that do not.

This is Lesson 13 out of 15 in the Building Concepts in Mathematics: Ratios and Proportional Relationships Series