Home Connection 16 H Activity

Transcription

1 NAME DATE Home Connection 16 H Activity NOTE TO FAMILIES For the past few weeks, we ve been working on our basic multiplication facts at school. Instead of just memorizing the facts, we have been making sense of them by thinking about situations when we use multiplication in daily life. We have also been exploring strategies for remembering how to solve multiplication facts. In the book Solving Multiplication Facts, you ll see story problems and strategies that can help your child make sense of and master the basic multiplication facts. As always, these strategies are shown in picture form too, using the rectangular array model that is explained at the beginning of the book. Instructions for Solving Multiplication Facts Book Please read the book Solving Multiplication Facts with your child. If your child is not able to read it, you can certainly read it aloud to him or her. The book invites you and your child to think of multiplication facts and sketch illustrations or write problems about them. These activities are meant to get you and your child involved and talking with each other about math. We encourage you to do them with your child and keep the book at home for future reference. Please sign and return this sheet when you have finished reading the book. Signature_ Date Bridges in Mathematics 99

2 NAME DATE Home Connection 17 H Worksheet NOTE TO FAMILIES This worksheet is intended to give your child some practice multiplying by 2, 3, 4, and 8. You can refer to your Solving Multiplication Facts booklet for reminders about different strategies for solving multiplication facts. Multiplying by 2, 3, 4 & 8 1 Circle all the doubles ( 2) in blue. Then go back and do them. 2 Circle all the doubles plus 1 set facts ( 3) in red. Then go back and do them Solve the following division problems if you like. Can you use what you know about multiplication to help? 9 3 = 16 8 = 21 7 = 14 7 = 10 5 = 12 4 = = 15 5 = 24 8 = 6 3 = Continued on back. Bridges in Mathematics 101

3 Home Connection 17 Worksheet (cont.) 4 Circle all the double-doubles ( 4) in blue. Then go back and do them 5 Circle all the double-double-doubles ( 8) in red. Then go back and do them Solve the following division problems if you like. Can you use what you know about multiplication to help? 24 3 = 16 4 = 32 4 = 56 7 = 24 6 = 48 6 = = 28 7 = 16 2 = 40 5 = 102 Bridges in Mathematics

4 Home Connection 18 H Activity NOTE TO FAMILIES This week s card game gives students practice with their multiplication facts. The game uses a variety of models for multiplication including the array model, counting patterns, and equal groups. Remind your child to complete the worksheet and return it to school. Instructions for Multiplication Draw 1 Shuffle the cards and place them face down between both players. 2 Each player draws a card and figures out the solution. The solution might be the solution to a multiplication fact, a missing number in a counting pattern, the total area of an array, or the total number of objects in equal groups. 5 Continue drawing cards until there are no cards left. Then determine how many cards each player has. Can you count the cards by 2 s or 3 s to make it faster? The player with the most cards wins! 12, 16, 20, What is the total area? 3 Make sure both partners agree on the solutions. 4 The player whose solution is greater takes both cards. Midori Mom, your solution is 24, because it s adding 4 each time. The area of my array is 36, so I win! Bridges in Mathematics 103

5 104 Bridges in Mathematics

6 Home Connection 18 Activity (cont.) s page 1 of 3 Cut out cards along solid lines. 9, 12, 15,, 21 12, 16, 20, 18, 24,, 36 18, 27,, 45 24, 32,, 48 21, 28,, 42 What is the total area? What is the total area? Bridges in Mathematics 105

8 Home Connection 18 Activity (cont.) s page 2 of 3 Cut out cards along solid lines. What is the total area? chairs legs What is the total area? dogs ears What is the total area? insects legs What is the total area? How many sides? Bridges in Mathematics 107

10 Home Connection 18 Activity (cont.) s page 3 of 3 Cut out cards along solid lines. How many legs? How many sides? How many eyes? How many legs? How many stars? How many stars? How many squares? How many triangles? Bridges in Mathematics 109

12 NAME DATE Home Connection 18 H Worksheet NOTE TO FAMILIES This worksheet gives students practice with some of the more difficult multiplication facts. You could encourage your child to use the 5 facts to help solve the 6 facts on this page and the 10 facts to help solve the 9 facts on the back. Refer to your Solving Multiplication Facts book if you need to review how these strategies work. The worksheet also provides some challenge with division facts if your child wants to try division, but students are not required to complete the division problems. Multiplying by 5, 6, 9 & 10 1 Circle all the clock facts ( 5) in blue. Then go back and do them. 2 Circle all the clock facts plus 1 set facts ( 6) in red. Then go back and do them CHALLENGE 3 Solve the following division problems if you like. Use what you know about multiplication to help. 6 6 = 12 6 = 5 5 = = 18 6 = 24 6 = 40 5 = 48 6 = 20 5 = 30 5 = 36 6 = 42 6 = Continued on back. Bridges in Mathematics 111

13 Home Connection 18 Worksheet (cont.) 4 Circle all the decade facts ( 10) in blue. Then go back and do them. 5 Circle all the decade minus 1 set facts ( 9) in red. Then go back and do them CHALLENGE 6 Solve the following division problems if you like. Use what you know about multiplication to help = = 18 9 = = = = = 81 9 = 112 Bridges in Mathematics

14 Home Connection 19 H Activity NOTE TO FAMILIES This week s game provides practice rounding to the nearest hundred. When rounding a number to the nearest hundred, look at the number in the tens place. For example, 348 rounded to the nearest hundred is 300, because 348 is closer to 300 than it is to 400. On the other hand, 383 rounded to the nearest hundred would be 400. When the number in the tens place is 5, we round up, so that 250 rounded to the nearest hundred is 300. When you have finished the game, have your child complete the worksheet and return it and the game record sheet to school. You ll need a record sheet, the nine number cards, a piece of scratch paper, and a pen and pencil or two different colored pencils or pens for recording. Instructions for Round Ball Hundreds 1 Mix up the cards and place them face down in a deck or spread out. 2 The first player draws 3 cards at random and arranges them to make a 3-digit number. In the example below, 8, 4, and 6 could be used to make 864, 846, 684, 648, 486, or 468. If you rounded 846 to the nearest 100, it would be 800. You would record 846 in the basketball hoop marked 800. Home Connections NAME Home Connection 19 Activity (cont.) Jacob DATE Feb. 20 Round Ball Hundreds Record Sheet Round Round Ball Hundreds Number Card 800 Round Ball Hundreds Number Card 900 lackline HC 19.2 Round Ball Hundreds Number Car B d Round Ball Hundreds Number Card The player returns the cards to the deck, mixes them up, and places them face down. The second player draws 3 cards, arranges them, rounds the number to nearest hundred, and records his or her number in the appropriate basket using a different color pen or pencil. 4 Continue taking turns drawing 3 cards each and deciding how to arrange the numbers and then round the 3-digit number. If you can t make a number for a hoop where you haven t written a number yet, you miss the turn. Remember to return your cards to the deck after each turn. 5 The first person to get 1 number in each basket wins. Round Play again with the baskets at the bottom of the page Bridges in Mathematics 113

16 Home Connection 19 Activity (cont.) Round Ball Hundreds Number Cards Cut out cards along solid lines. 2 Round Ball Hundreds Number Card 8 Round Ball Hundreds Number Card 3 Round Ball Hundreds Number Card 9 Round Ball Hundreds Number Card 4 5 Round Ball Hundreds Number Card Round Ball Hundreds Number Card 6 7 Round Ball Hundreds Number Card Round Ball Hundreds Number Card Bridges in Mathematics 115

18 NAME Home Connection 19 Activity (cont.) Round Ball Hundreds Record Sheet Round 1 DATE Round Bridges in Mathematics 117

19 NAME DATE Home Connection 19 H Worksheet NOTE TO FAMILIES This worksheet gives students practice rounding to the nearest ten and hundred. Round numbers to the nearest ten by checking the digit in the ones place. If that digit is 5 or greater, round up to the next ten. If the digit is 4 or less, the digit in the tens place stays the same. When you round to the nearest hundred, check the digit in the tens place. If that digit is 5 or greater, round up to the next hundred. If that digit is 4 or less, the digit in the hundreds place stays the same. Rounding to Tens & Hundreds 1 Round the following numbers 2 Round the following numbers to the nearest 10. to the nearest _ 213 _ 78 _ 347 _ 87 _ 576 _ 55 _ 408 _ 63 _ 665 _ CHALLENGE 3 Look for numbers in the newspaper you can round to the nearest ten and hundred. Record them below. What kind of number Write the number Round to the tens place Temperature Round to the hundreds place 118 Bridges in Mathematics

20 Home Connection 20 H Activity NOTE TO FAMILIES This week you and your child will take turns drawing at least two number cards that you ll add together to get as close to 200 as you can. The object of the game is to be the player who comes closest to 200. This game will provide some additional practice with 2- and 3-digit addition and subtraction. Remind your child to complete the worksheet and return it to school, along with with the 3 record sheets. You ll need a deck of Make 200 Cards, a record sheet, and two pencils. Instructions for Make Get a deck of Make 200 Cards to share. Shuffle the cards and place them face down between you. 2 You ll each fill out your own grids on the same paper. 3 Take 2 cards and turn them face up. Estimate the sum of the amounts shown on the two cards. Record the two numbers in the boxes below the grids and color in the amounts on your grids. Use a different color for each number. Color in both grids completely before you start using the strips and units on the right. Now the other player draws 2 cards and does the same. 5 You and your partner each need to decide for yourselves whether you ll draw a third card or whether you will hold. 6 When you have both drawn a third card or decided to hold, fill in your totals and figure out how far over or under 200 you both are. The player who is closest to 200 wins. 7 Use the other two record sheets to play two more rounds together. Home Connections NAME Emma Home Connection 20 Activity (cont.) Make 200 Record Sheet Emma Player A DATE Make 200 Card = Make 200 Card Player A was under 200 / over 200 by Bridges in Mathematics 119

22 Home Connection 20 Activity (cont.) Make 200 Cards Cut out cards along solid lines. Make 200 Card Make 200 Card Make 200 Card Make 200 Card Make 200 Card Make 200 Card Make 200 Card Make 200 Card Bridges in Mathematics 121

24 NAME Home Connection 20 Activity (cont.) Make 200 Record Sheet page 1 of 3 DATE Player A + + = Player A was under 200 / over 200 by Player B + + = Player B was under 200 / over 200 by Bridges in Mathematics 123

25 NAME Home Connection 20 Activity (cont.) Make 200 Record Sheet page 2 of 3 DATE Player A + + = Player A was under 200 / over 200 by Player B + + = Player B was under 200 / over 200 by 124 Bridges in Mathematics

26 NAME DATE Home Connection 20 Activity (cont.) Make 200 Record Sheet page 3 of 3 Player A + + = Player A was under 200 / over 200 by Player B + + = Player B was under 200 / over 200 by Bridges in Mathematics 125

27 NAME DATE Home Connection 20 H Worksheet NOTE TO FAMILIES This worksheet gives students some additional practice with 2-and 3-digit addition and subtraction problems. Some students may use sketches and number lines to solve the problems, while others may work just with the numbers. Adding & Subtracting 2- & 3-Digit Numbers 1 Write each sum below. Show your work = _ = _ = _ Write each difference below. Show your work = _ = _ = _ Bridges in Mathematics