Copyright © Ed2Net Learning, Inc.1 Rates (Unit) Grade 6
Copyright © Ed2Net Learning, Inc.2 Convert the following decimals to percent: Warm up
Copyright © Ed2Net Learning, Inc.3 Let’s Review what we have learned in the last lesson The decimal point separates the whole units on the left from the decimal units on the right. The numbers on the left side represent whole numbers. The numbers on the right side of the point are the decimal values. The naming difference is in the "th“ Percent means parts per hundred. we use the symbol % for percent.
Copyright © Ed2Net Learning, Inc.4 For converting decimals to percent Multiply the decimal by 100 and put the % sign For converting percent to decimals First remove the Percent sign. Divide by 100 Recap
Copyright © Ed2Net Learning, Inc.5 What is rate/unit rate? A rate is a ratio that is used to compare different kinds of quantities. A unit rate describes how many units of the first type of quantity corresponds to one unit of the second quantity. Examples of unit rates: miles per hour, kilometers per hour, meter per seconds, cost per item, earnings per week, etc.
Copyright © Ed2Net Learning, Inc.6 Finding unit price A unit price is a rate comparing the price of an item to its unit of measure. To find the unit price of an item divide the total cost by the number of items bought. After finding the unit price we can also find the cost of more than one item Multiply the unit price by the number of items you are buying
Copyright © Ed2Net Learning, Inc.7 Price of 5 apples is $20. Find the unit price and find the price of 7 apples. Unit price = 20/5 = $4 Price of 7 apples = 7 × 4 = $28 The price of 7 apples is $28. To find the unit Price divide total cost by the number of items bought. Example 1
Copyright © Ed2Net Learning, Inc.8 John can type 923 words in 13 minutes. Find how many words per minute can he type. Unit rate = 923/13 = 71 John can type 71 words per minutes. To find the unit rate divide total words by the number of minutes. Example 2
Copyright © Ed2Net Learning, Inc.9 Distance, rate and time Distance = Rate × time To find distance multiply rate by time Rate = Distance/time To find rate divide distance by time Time = Distance/rate To find time divide distance by rate
Copyright © Ed2Net Learning, Inc.10 On a trip, Kate traveled 600 km. for 10 hours. Find her average speed? Average Speed = Rate Rate = Distance/time Rate = 600/10 = 60 km. per hour Kate’s average speed was 60 km./hour. To find the rate divide distance by time. Example 3
Copyright © Ed2Net Learning, Inc.11 Let’s take a break!!
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Copyright © Ed2Net Learning, Inc.13 Your Turn Find the unit rate: seats in 9 rows miles in 5 hours seats in 5 rows pages in 4 days meters in 5 seconds
Copyright © Ed2Net Learning, Inc.14 Your Turn Find the unit rate: seats in 13 rows miles in 6 hours words in 5 minutes steps in 2 minutes meters in 6 seconds
Copyright © Ed2Net Learning, Inc.15 1) Maria works in a book store and she earns $100 for 5hours of work. i) At this rate, how much would she earn in 8 hours? ii) How many hours would it take to earn $250?
Copyright © Ed2Net Learning, Inc.16 2) A car travels east at a speed of 50 mph and a motorcycle travels west at a speed of 55 mph. If they start at the same time and place, how long will it take them to be 315 miles apart?.
Copyright © Ed2Net Learning, Inc.17 3) The population of Alaska is 603,617 with 253,922 of those people living in Anchorage. The area of Alaska is 570,374 square miles. The area of Anchorage is 1,697.6 square miles. a. Find the population density of Alaska b. Find the population density of Anchorage
Copyright © Ed2Net Learning, Inc.18 Let Us Review A rate is a ratio that is used to compare different kinds of quantities. A unit rate describes how many units of the first type of quantity corresponds to one unit of the second type of quantity. A unit price is a rate comparing the price of an item to its unit of measure. To find the unit price divide the total cost by the number of items bought.
Copyright © Ed2Net Learning, Inc.19 Let Us Review Rate = Distance/time To find rate divide distance by time Time = Distance/rate To find time divide distance by rate
Copyright © Ed2Net Learning, Inc.20 You had a Great Lesson Today! Be sure to keep practicing