Mr. Singh Think of one interesting thing about yourself.

About the student

What I expect from the class Listen to what your teacher has to say. Raise your hand when asking a question. When working in a group use the “quite voice”. Enjoy the activities we will do in class, and help your classmates.

Agenda for today Introduction (5 min) Magic with numbers activity (5 min) Lesson on ratio (10 min) Bubble Gum activity (5 min) Lesson on proportion (10 min) Capture recapture Activity (20 min) Exit Slip (5 min)

Activity 1: Magic with numbers Think of a number between 1-20 Double this number Add 1234 Divide by 2 Subtract the original number from your answer Subtract 93 The result is _______________

What did you learn from the magic with number activity?

Goals for today Learn about ratio and rate. Learn to setup and solve proportion. Use ratios and proportion to solve real life problems.

What is ratio? 1a. A ratio is _____________________________________ There are ________________ to write a ratio. Example 1. John could run a mile in 25 minutes _______________or__________or ______________ Comparison of two numbers 3 ways 1 mile 25 minutes 1 mile : 25 minutes 1 mile to 25 minutes

Example 2. Two pounds of grapes cost $4.45 _____________ Example 3. In a math class there are 5 boys and 6 girls. _______________________ 2 lbor$4.45 $4.452lb 2lb : $4.45or2lb to $ boysor6 girls 6 girls5 boys 5 boys : 6 girlsor 6 girls to 5 boys

Practice 1: A can of soda cost 75 cents. ________ Practice 2: There are 2 yellow beans for every 5 red beans. _______ Practice 3: Three feet is equal to one yard. ________ 1 can or 1can : 75 cents or 75 cents to 1 can $ yard 3 feet : 1 yard or 3 feet to 1 yard 3 feet 2 yellow beans or 2yb : 5rb or 2 yellow to 5 red 5 red beans

Activity 2: Blowing bubble Contest Remember to use your “quite voice”. Student one – Count the bubbles Student two – Blow the bubbles Student three – keep track of the time Student four- record the data gathered

What are some other rates you see in real life?

Proportion _______________________ Cross product 2*3 = 6*1  6=6 Cross product of a proportion is always equal. Show that two ratios (or fractions) are equal.ratios

Example 4. If a turtle travels 5 inches every 10 seconds, how far will it travel in 50 seconds? 5 inchesx inches 10 seconds 50 seconds = The turtle will travel 25 inches in 50 seconds

Example 5. David read 40 pages of a book in 5 minutes. How many pages will he read in 80 minutes if he reads at a constant rate? Example 6. On a map, one inch represents 150 miles. If Las Vegas and Reno are five inches apart on the map, what is the actual distance between them?

Example 7. Ricaldo work as a landscaper and earn $13.75 per hour. How many hours Ricaldo worked if he earned $576 last week.

Practice 4. If there were 7 males for every 12 females at the dance, how many females were there if there were 21 males at the dance? Ask yourself is there a ratio, a comparison in that problem? What’s being compared? Practice 5. Bob had 21 problems correct on a math test that had a total of 25 questions, what percent grade did he earn? (In other words, how many questions would we expect him to get correct if there were 100 questions on the test?) Practice 6. If there should be three calculators for every 4 students in an elementary school, how many calculators should be in a classroom that has 44 students? If a new school is scheduled to open with 600 students, how many calculators should be ordered? Practice 7. If your car can go 350 miles on 20 gallons of gas, at that rate, how much gas would you have to purchase to take a cross-country trip that was 3000 miles long?

Blueberry Muffin Recipe Prep Time: 15 MinutesCook Time: 25 Minutes Ready In: 40 MinutesServings: 8 INGREDIENTS: 1 1/2 cups all-purpose flour1/3 cup milk 3/4 cup white sugar1 cup fresh blueberries 1/2 teaspoon salt1/2 cup white sugar 2 teaspoons baking powder1/3 cup all-purpose flour 1/3 cup vegetable oil1/4 cup butter, cubed 1 egg1 1/2 teaspoons ground cinnamon

-What do you learn about the ratios and proportion? -Can ratios and proportion be used to solve everyday problems?

Lion population Kenya's lions could vanish within 10 years Kenya has been losing 100 lions a year for the past seven years, leaving the country with just 2000 lions in year 2009.

Global Polar bear populating is estimated to be between 20,000 to 25,000. Worldwide population estimates are uncertain, but recent consensus suggests an absolute minimum of 50,000 killer whale.

How would someone measure the bird population?

Capture and recapture activity *Wait for your teacher’s permission before starting the activity *Work quietly in group of four -Student one – read the direction -Student two – bring the material and observe for mistakes -Student three – perform the activity -Student four- record the data gathered

-How did this activity helped you enhance your knowledge about ratio and proportion?