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Come in, get out stuff for notes and copy the following table! IT WILL BE ON THE NEXT TEST! Definition Example Fraction: A number that represents part of a whole or part of a set. ½, ¾, …. Ratio: A comparison of two quantities by division. 2 out of 3, 2 to 3, 2:3, 2/3 Rate: a ratio comparing two quantities with different kinds of units. 36 miles / 3 hours 36 Miles for every 3 hours $26 for 5 bags 19 songs in 5 minutes Unit rate: A rate that is simplified so that it has a denominator of 1. 12 miles/ 1 hour 12 miles per hour 3.8 song in 1 minute REAL WORLD LINK • Desiree typed a 15-character text message in 5 seconds. 1. Write the rate Desiree typed as a fraction. 2. What operation would you use to write the fraction in simplest form? Questions??? • What is a rate? • What is a unit rate? Compare and contrast with a partner and then we will talk about it.. Examples: • Samantha picked 45 oranges in 5 minutes. Write this rate as a unite rate. 1. Write the rate as a fraction. 2. Compare the number of oranges to the number of minutes. 3. Then divide. The unite rate is??? Example: • The Australian dragonfly can travel 18 miles in 30 minutes. How far can the dragon fly travel in 1 minute? 1. Write the rate as a fraction. 2. Compare the distance to the number of minutes. 3. Then divide. You try it… • Ama downloaded 35 songs in 5 minutes. How many songs did she download per minute? • Jonathan is baking several loaves of bread to sell in his bakery. He used 9 cups of water and 12 cups of whole wheat flour. How much water was used per cup of flour? Example: • An adult’s heart beats about 2,100 times every 30 minutes. A baby’s heart beats about 2,600 times every 20 minutes. How many more beats does a baby’s heart beat in 60 minutes than an adult’s heart? – Find the unit rate: – Using the unit rate for each, determine the number of beats in 60 minutes. – Find the difference. You try it… • A hummingbird’s heart rate while resting is about 7,500 beats every 30 minutes. How many more beats does a hummingbirds heart beat in 60 minutes that an human baby’s heart. (human baby’s heart: 2,600 times every 20 minutes.) Notes: • We can use what we know about unit rates to find the unit price. • A unit price is the cost per unit. To write a price as a unit price, divide the numerator and the denominator of the rate by the denominator. Example: • What is the unit price for $36.00 for 4 tickets. Example: • Financial Literacy: Four potted plants cost $88. What is the price per plant? – Write the rate as a fraction. – Compare the total cost to the number of plants. – Then divide. Homework.