Lesson Objective Identify the value of a group of coins that includes pennies and/ or dimes.

Transcription

1 LESSON 9.9B Count Coections LESSON AT A GLANCE Daiy Routines Mathematics Forida Standard Te and write time. MAFS.1.MD.2.a.b Identify and combine vaues of money in cents up to one doar working with a singe unit of currency. Compute the vaue of combinations of coins (pennies and/or dimes). Lesson Objective Identify the vaue of a group of coins that incudes pennies and/ or dimes. Essentia Question How can you count a group of pennies and dimes? Materias MathBoard, Coins: pennies, dimes (see Teacher Resources) Probem of the Day Caendar Math Ron is 7 years od. He has 2 pennies for each year of his age. What date has the same number as the tota vaue of Ron s pennies? What day of the week is it? 14th; day of the week wi vary depending on the caendar month being used Ask a vounteer to show how to sove the same probem if Ron is 9 years od. Digita Path Animated Math Modes itoos: Measurement HMH Mega Math estudent Edition PROFESSIONAL DEVELOPMENT PROFESSIONAL DEVELOPMENT Why Teach This About the Math As chidren earn to count coections of coins, they soon discover that a group with a fewer number of coins may have a greater tota vaue than a group with a greater number of coins. Chaenge chidren to find ways to make amounts using the fewest possibe coins. Trading coins wi buid fuency in making equivaent amounts and future work with money concepts. Fuency Buider Counting Tape Materias Counting Tape As you approach Day 150, ask questions reated to that andmark. How many days unti Day 150? Answer wi depend on current Day. Today is Day 150. How many days of schoo have we had since Day 100? 50 Using the Counting Tape, remind chidren that 50 was the hafway point to 100. Where do you think 200 wi be on our Tape? Why do you think so? Accept reasonabe answers. For the remainder of the year, continue to mode discussion questions on past exampes. As the end of schoo nears, you might te chidren how many days are in the schoo year, and ask some questions that focus on how many days are eft Professiona Deveopment Video Podcasts FL21A Chapter 9

2 Differentiated Instruction Activities ELL Language Support Visua / Verba Sma Group Enrich Visua / Verba Sma Group Strategy: Mode Concepts Materias Coins: pennies, dimes (see Teacher Resources) Show a row of 3 dimes and 3 pennies. Te the chidren you want to count to find the tota vaue of the coins. Put 10 pennies beow each dime. Why woud we put 10 pennies beow each dime? A dime has a vaue of 10 cents. Cover the dimes. Mode how to count the groups of pennies, starting at ten, then counting on by ones to find the tota vaue: 10, 20, 30, 31, 32, 33. Materias Coins: pennies, dimes (see Teacher Resources) Give chidren the foowing probem to sove: I have 2 dimes and 2 pennies. A friend gives me 1 coin. Now I have 32. What coin did I get? a dime Have chidren fi in their own word probems. I have and. A friend gives me 1 coin. Now I have. What coin did I get? Have partners exchange probems and check the soutions by acting out the story. See ELL Activity Guide for eveed activities.? Response to Intervention Tier 1 Visua / Verba Whoe Cass / Sma Group Tier 2 Visua / Verba Sma Group Materias Coins: pennies, dimes (see Teacher Resources) Dispay a row of 2 dimes and 3 pennies. I have these coins. Can I count the number of coins to find the tota vaue? No, different coins have different vaues. How many pennies can I put beow each coin to show its vaue? 10 pennies beow each dime Put the pennies beow the coins. Cover the dimes. Work together to count the groups of pennies: 10, 20, 21, 22, 23. The vaue of the pennies is 23. Cover the penny trades and count the top row of mixed coins in the same way: 10, 20, 21, 22, 23. The tota vaue of my coins is 23. Materias Coins: pennies, dimes (see Teacher Resources) Show chidren a dime and have them name the coin. How can we show the vaue of the dime with pennies? 10 pennies have the same vaue as 1 dime. Pace 10 pennies beneath the dime. Cover the dime and have chidren count the pennies. We have 10 pennies in a. Then cover the pennies and have chidren count the vaue of the dime as you point to the respective coin, dime has a tota vaue of 10. FL21B

3 LESSON 9.9B 1 ENGAGE MAFS.1.MD.2.a.b Identify and combine vaues of money in cents up to one doar working with a singe unit of currency. Compute the vaue of combinations of coins (pennies and/or dimes). GO itoos Onine HANDS ON Count Coections Materias itoos: Money Show Amounts Show Amounts of Money Essentia Question How can you count a group of pennies and dimes? Access Prior Knowedge Demonstrate how to use the itoos money to stamp coins, seect the button to enter the tota amount, and then cick the Check button to see if they are correct. Have chidren show a group of 9 pennies and find the tota vaue. Repeat the activity, showing a group of 9 dimes. 2 TEACH and TALK GO Onine Use coins to show the probem. Draw and abe the coins. Possibe answers: 20 pennies or 2 dimes. Animated Math Modes c Listen and Draw Materias Coins: pennies, dimes (see Teacher Resources) Read the foowing probem aoud. Juan has some pennies and dimes. He chooses one kind of coin to show 20 cents. How can Juan show 20 cents? Houghton Miffin Harcourt Pubishing Company Have chidren draw to show how Juan might use ony pennies or ony dimes to show 20 cents. 20 pennies or 2 dimes Discuss the different soutions. Did each chid in the cass show the same number of coins? Why or why not? No; Possibe answer: Not everyone chose the same coin to use. Each kind of coin has a different vaue, so you need different numbers of each coin to make the same amount. FOR THE TEACHER Juan has some pennies and dimes. He chooses one kind of coin to show 20 cents. How can Juan show 20 cents? What coin has the same vaue as 10 pennies? Expain. FL21 Chapter 9 1_MFLAESE500785_C09L09B.indd 21 5/30/14 10:31:23 PM Standards Practice 9.9B 10 pennies have the same vaue as 1 dime, so the tota vaue of a group of 1 dime and 10 pennies is the same as a group of 2 dimes. Use Math Tak to focus on chidren s understanding of how the vaue of coins reate to each other. Count Coections Lesson Check Count. Write the tota vaue. 1. What is the tota vaue? What is the 2. tota vaue? 42 Spira Review Which yarn is the ongest? What is the sum? (Lesson 3.3) (Lesson 9.1) 6 16 _ Houghton Miffin Harcourt Pubishing Company Draw and abe coins to sove. 4. A banana costs 24. Draw coins you coud use to buy the banana. Possibe answer: 2 dimes and 4 pennies Chapter 9 FL21 Chapter 9 1_MFLAEPB501683_C09L09B.indd 11 eeven PFL11 5/31/14 10:05:28 AM PFL Houghton Miffin Harcourt Pubishing Company 2 dimes have a tota vaue of 20 cents. What if I trade one dime for 10 pennies? What is the tota vaue of my coins now? Expain. 20 cents; Possibe answer: Math Tak: Possibe answer: 1 dime; 1 dime or 10 pennies a have a tota vaue of 10 cents. tweve 1_MFLAEPB501683_C09L09B.indd 12 5/31/14 10:13:02 AM

4 Count to fi nd the tota vaue. 10 _ Share and Show Count. Write the tota vaue FL _ Mode and Draw Why woud you start with the dimes? 30 _ 31 _ 32 _ 3 3 _ tota vaue Houghton Miffin Harcourt Pubishing Company c If Mode and Draw Quick Check GO Onine Animated Math Modes Work through the mode, showing how to count the coins by tens and then by ones. Have chidren count again and write the numbers as they count each coin. How are the coins arranged? The coins are in order from greatest vaue to east vaue. Show chidren that counting money is more ordery when you start with the coins of greater vaue. c 3 PRACTICE Share and Show Guided Practice Exercises 1 3 connect to the earning mode. Wi a coection with a greater number of coins aways have a greater tota vaue? Expain. No, it depends on the vaues of the coins in the coection. Can two different coections of coins have the same tota vaue? Why or why not? Yes, groups can have different combinations of coins that count to the same tota vaue. Exercises 2 and 3 may be used for Quick Check. Chidren shoud use their MathBoards to show their soutions. a chid misses Exercises 2 and Rt I Reteach 9.9B Count Coections Find the tota vaue of the coins. Count the coins with the greatest vaue first. To find Reteach Enrich 9.9B Money to Spend Enrich Juan and Lisa go to the toy store. Juan has 51 to spend. Circe the coins Juan coud have. Lisa has 44 to spend. Put an X on the coins Lisa coud have. Answers wi vary, but circed coins shoud tota 51 and coins with Xs shoud tota 44. Then Differentiate Instruction with RtI Tier 1 Activity FL21B Reteach 9.9B Count tota vaue Count. Write the tota vaue Writing and Reasoning Who has a greater amount of money to spend, Juan or Lisa? Expain. Juan does, because 51 is more than 44. COMMON ERRORS Error After counting dimes, chidren may continue to count pennies by tens. Exampe In Exercise 1, chidren write a tota vaue of 50. Springboard to Learning Remind chidren to identify the vaue of each coin being counted. Reteach Houghton Miffin Harcourt Pubishing Company RFL6 Grade 1 Enrich EFL6 Grade 1 Houghton Miffin Harcourt Pubishing Company FL22

5 c On Your Own Independent Practice If chidren answered Exercises 2 and 3 correcty, assign Exercises 4 9. They are now writing ony the tota vaue of each group. Chidren can use their MathBoards to continue to write vaues as they count if they need to. Probems Exercises 8 and 9 require chidren to count coins that are not in an ordered row. Go Deeper To extend thinking, chaenge chidren to draw to show two different coections of coins that have the same tota vaue as the group shown in Exercise 4. Have vounteers share their soutions. On Your Own Count. Write the tota vaue Write the tota vaue Houghton Miffin Harcourt Pubishing Company Chapter 9 Lesson 9B FL23 Extend the Math Activity Equa Amounts Materias Coins: pennies, dimes (see Teacher Resources) Investigate Have chidren use coins and write or draw to show two different groups of coins that have the same tota vaue. Then have chidren find the ways to make the same amount using the greatest number of coins and the east number of coins. Math Tak As you go through the foowing questions, have chidren mode their groups and expain their methods. Answers wi vary. Possibe answers are shown for a chid making groups of coins that tota 45. What two groups of coins did you make? Possibe answer: 3 dimes, 15 pennies; and 2 dimes, 25 pennies What is the tota vaue of each group? 45 How can you make the same amount using the greatest number of coins? 45 pennies How can you make the same amount using the fewest coins? 4 dimes and 5 pennies Can there be any more ways to make the same amount? Possibe answer: Yes, for exampe, 1 dime and 35 pennies. Why are there so many ways to make the same amount? There are many ways to trade coins to make groups that have the same tota vaue. Summarize Chidren choose coins to represent the same tota vaue in two different ways. Then they trade coins to find ways to make the same amount using the greatest and east number of coins. FL23 Chapter 9

6 PROBLEM SOLVING Draw and abe coins to sove. 10. Cindy has 4 coins. The tota vaue is 22. Draw the coin that is missing. Chidren shoud draw and abe a dime. 11. A penci costs 31. Draw coins you coud use to buy the penci. Possibe answer: 3 dimes, 1 penny 12. Kar has 30 pennies. Show the same amount with fewer coins. Chidren shoud draw and abe 3 dimes. c Probem Soving Have chidren sove each probem. Chidren may use different strategies to sove Exercise 10. Encourage chidren to share their methods. Probem In Exercise 12, chidren use higher order thinking skis to meet two criteria. Test Prep Coach Test Prep Coach heps teachers to identify common errors that chidren can make. In Exercise 13, if chidren seected: 40, they counted the entire group by tens. 26, they counted one of the dimes as a nicke. 4, they counted the number of coins. 13. Test Prep What is the tota vaue? FL TAKE HOME ACTIVITY Have your chid count to identify the tota vaue of groups of pennies and/or dimes, up to 50 cents. Houghton Miffin Harcourt Pubishing Company 4 SUMMARIZE Essentia Question How can you count a group of pennies and dimes? Possibe answer: Start with the dimes and count by tens. Then count on the pennies by ones to get the tota vaue. Math Journa Expain how to find the tota vaue of a group of 3 pennies and 3 dimes. Differentiated Instruction Dif Di INDEPENDENT ACTIVITIES Differentiated Centers Kit Activities A Pretty Penny Chidren compete orange Activity Card 15 by showing sets of pennies and their vaues. Literature Ken s Coins Chidren read this book and use cues to find hidden coins. Games Bank It Games Chidren practice counting money. Animated Math Modes itoos HMH Mega Math Soar to Success Math e Student Edition FL24