Unit 2, Lesson 1
Introducing Ratios and Ratio Language
Grade 6
1.1
Warm-up
Think of different ways you could sort these figures. What categories could you use? How many groups would you have?
Student Lesson Summary
A ratio is an association between two or more quantities. There are many ways to describe a situation in terms of ratios. For example, look at this collection:
Here are some correct ways to describe the collection:
- The ratio of squares to circles is .
- The ratio of circles to squares is 3 to 6.
Notice that the shapes can be arranged in equal groups, which allow us to describe the shapes using other numbers.
- There are 2 squares for every 1 circle.
- There is 1 circle for every 2 squares.
A ratio is a way to relate 2 or more quantities.
For example, the ratio could describe:
- A recipe that uses 3 cups of flour for every 2 eggs.
- A boat that moves 3 meters every 2 seconds.
- A diagram that has 3 blue squares for every 2 green squares.