# Ratios and Proportions / Ratio Tables

Activity 4 of 15
The lesson engages students in reasoning about ratios and proportions using their knowledge of multiplication tables. They learn that ratio tables are one strategy to solve problems involving ratios.

## Planning and Resources

Objectives
Students should understand and be able to explain how to use ratio tables to solve problems. They recognize that the sum of equivalent ratios is another equivalent ratio.

Vocabulary
distributive property

Standard:

## Lesson Snapshot

#### Understanding

In addition to solving problems by finding the sum/ difference of the columns in a ratio table, they use the notion of unit rate as a strategy to find solutions to problems involving proportions.

### What to look for

Be sure that students pay attention to the units or labels in setting up and working the problems. Ratios only make sense in context and the units involved in the context are important in setting up a ratio and interpreting any equivalent ratio.

### Sample Assessment

A car can travel 250 miles on 6 gallons of gasoline. How far can it travel on 9 gallons?