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# Unit 2: Introducing ratios

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In this unit, students learn to understand and use the terms “ratio,” “rate,” “equivalent ratios,” “per,” “at this rate,” “constant speed,” and “constant rate,” and to recognize when two ratios are or are not equivalent. They represent ratios as expressions, and represent equivalent ratios with double number line diagrams, tape diagrams, and tables. They use these terms and representations in reasoning about situations involving color mixtures, recipes, unit pricing, and constant speed.

## Lesson 2: Representing ratios with diagrams

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## Lesson 5: Defining equivalent ratios

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#### Quiz 1

Level up on the above skills and collect up to 320 Mastery points

## Lesson 7: Creating double number line diagrams

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## Lesson 9: Constant speed

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## Lesson 10: Comparing situations by examining ratios

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### Practice

#### Quiz 2

Level up on the above skills and collect up to 320 Mastery points

## Lesson 13: Tables and double number line diagrams

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### Practice

#### Quiz 3

Level up on the above skills and collect up to 320 Mastery points

## Lesson 15: Part-part-whole ratios

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## Lesson 16: Solving more ratio problems

### Practice

#### Quiz 4

Level up on the above skills and collect up to 160 Mastery points
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#### Unit test

Level up on all the skills in this unit and collect up to 1400 Mastery points!