# 6 th Grade Math Focus 1 Ratios Rates

• Slides: 20

6 th Grade Math- Focus 1 Ratios, Rates and Proportions Standards: 6. RP. 1, 6. RP. 3 a, 6. RP 3 d, M 06. S 5 C 2. 09 Resource: Van De Walle pages 154 -159

Welcome to Our Math Class! Let’s look around the room and see what parts make up our whole class! q. How many students make up the whole class? q. How many girls make up part of our class? q. How many girls are in our class compared to our whole class? q Write the number of girls (part) compared to

q. How many boys make up part of our class? q How many boys in our class compared to our whole class? q Write the number of boys (part) compared to the class (whole) as a FRACTION.

Types of RATIOS Vocabulary Definition: A ratio is a comparison of any two quantities. When you are comparing two of the SAME measures, you are using these two types of ratios. � Part to Whole Ratios

What is a Part to Whole RATIO? ü PART to WHOLE RATIOS can be written in THREE different ways. ü Did you know? Ratio! ü Did you know? Ratio! Using a COLON Using the word, “to” Part : Whole Part to Whole Every FRACTION is a Part to Whole Every PERCENT is a Part to Whole Every DECIMAL is a Part to Whole Student Practice- Write your answers in your math journal/workbook.

What is a Part to Part Ratio? Let’s compare the number of girls to the number of boys in our class. Ø How many girls (part) are in our class? Ø How many boys (part) are in our class? Ø PART to PART RATIOS are be written in TWO different Using a COLON Using the word, “to” ways. Part : Part to Part Student Practice- Write your answers in your math journal/workbook. 2. Why can’t fractions be PART to PART Ratios? 3. Using the two different ways to write Part to Part Ratios, represent the part to part comparisons of the girls to boys in our whole math class. 4. Using the two different ways to write Part to Part Ratios,

th 6 Grade Math Homework My Life in Numbers! YOU MAY WRITE ON THE WORKSHEET. You will be turning in it on

Brain. POP Video: Ratio �http: //www. brainpop. com/mat h/ratioproportionandpercent/r atios/

Types of RATIOS Vocabulary Definition: A ratio is a comparison of any two quantities. When you are comparing two DIFFERENT measures, you are using this types of ratio. � Rate- comparing two

What is a RATE? A RATE RATIO (or just RATE)- compares measures of two different types. For example, these are all rates. • miles per hour • dollars per item • cents per pound • passengers per busload

Measurement Relationships as Rates �Relationships between two units of measure are also rates. For example, these are all rates. • Inches per foot • Milliliters per liter • Centimeters per inch

Can you tell what type of Ratios it is? Part to Whole, Part to Part, or Rate Student Practice- Write your answers in your math journal/workbook. 5. Number of red roses to number of yellow roses 6. Number of points earned to number of possible points 7. Number of footballs per PE class 8. Number of roses per flower arrangement 9. Number of heads on a penny after ten tosses 10. Number of footballs to number of balls in the PE supply 11. Number of footballs to number of soccer balls 12. Number of points earned per student 13. Number of points earned to number of points not earned 14. Number of red roses to number of flowers in bouquet 15. Probability of getting a head with one coin toss

Can you tell what type of Ratios it is? Part to Whole, Part to Part, or Rate CHECK your answers in your math journal/workbook. 5. Part to Part 6. Part to Whole 7. Rate 8. Rate 9. Rate 10. Part to Whole 11. Part to Part 12. Rate 13. Part to Part 14. Part to Whole 15. Part to Whole 16. Part to Part

Now that we know about Ratios… What are Proportions? �

Include the Units of Measure with Rates �

Which Has More? (Van de Walle, Activity 6. 1) Student Practice- Write your answers in your math journal/workbook. Situation 1: Which class team has more girls? (Which class team has a larger proportion of girls? ) Situation 2: Which fish tank has more goldfish? (Which fish tank has a larger proportion of goldfish? )

Which Has More? (Van de Walle, Activity 6. 1) Student Practice- Write your answers in your math journal/workbook. Situation 3: Which figure has more circles? Situation 4: Did Ollie or Sandy grow more?

Which Has More? (Van de Walle, Activity 6. 1) Class Discussion about Situations 1 & 2 Class Discussion about Situations 3 & 4 1. Which class team 3. Which figure has more girls? more circles? 2. Which fish tank has more goldfish? 4. Did Ollie or Sandy grow more?

Ticket Out the Door! �What is the definition of a RATIO? �What is ONE type of ratio? �What is ANOTHER type of ratio? �What is a comparison of two same measures called? �What is a comparison of two different measures called? �What type of ratio is a fraction or percent? �What is a comparison of two ratios called? Did we follow the Sabercat Way