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Introduction to Ratios

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Introduction to Ratios

📚 Part 1: Understanding Ratios

Learning Goals - I Can Statements:

✓ I can define what a ratio is
✓ I can express ratios using a colon, fraction, or words
✓ I can write ratios correctly from everyday examples

1. What is a ratio?

A ratio is a _________________ of two quantities by division.

2. The THREE ways to express ratios are:
3. Look at this example: 5 red apples and 3 green apples

Write the ratio of red apples to green apples in all three forms:

Colon form: _______

Fraction form: _______

Word form: _______ to _______

✏️ Part 2: Writing Ratios from Scenarios

4. At the pet store, there are 8 cats and 12 dogs. Write the ratio of cats to dogs:

Colon form: _______

Fraction form: _______

Word form: _______

5. In a classroom, there are 15 pencils and 6 erasers. Write the ratio of pencils to erasers:

Colon form: _______

Fraction form: _______

Word form: _______

6. Choose the correct way to express "4 to 7" as a ratio:

4/7 and 4:7

7/4 and 7:4

4 + 7

4 × 7

7. At the park, there are 12 boys and 18 girls. Write the ratio of boys to girls in all three forms:

🎯 Part 3: Reflection & Real-World Application

8. Explain in your own words what a ratio tells us:
9. Look around the classroom. Find two different objects and create your own ratio:

I see _____ _____________ and _____ _____________

My ratio is: _______ (colon form)

10. Success Check: Can you do these things? Check all that you can do:

Define what a ratio is

Write ratios using colons (like 3:2)

Write ratios as fractions (like 3/2)

Write ratios in words (like "3 to 2")

Create ratios from real-life examples

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