Home Connection 13 H Activity NOTE TO FAMILIES At school we played a multiplication game called Loops & Groups, and we d like to teach you how to play! Your child can show you how to use a pencil and paperclip as a spinner to play this game. You may remember that in the equation 4 x 2 = 8, 4 and 2 are called the factors and 8 is called the product. Please have your child return the record sheet and worksheet to school. You ll need the spinner on the back of this page, record sheet, two pencils, and a paperclip to play Loops & Groups. Instructions for Loops & Groups 1 The first player spins the Loops Spinner and draws that many loops. Then the player spins the Shapes Spinner to see how many and what kind of shape to draw in each loop. 2 The player then records the multiplication fact that is represented by the picture. Talk about your strategies for finding the product (the total number of shapes in the loops). 4 Continue taking turns until each player has had 4 turns. At the end, both players find the sum of their 4 products. Talk to each other about how you added the 4 numbers. Home Connections NAME Home Connection 13 Activity (cont.) Loops & Groups Record Sheet Partner 1 First turn Second turn Yoshiko Yoshiko DATE Partner 2 First turn Second turn Mom 5 x 2 = 10 1 x 4 = 4 Third turn 2 x 6 = 12 3 x 5 = 15 Third turn Fourth turn 6 x 5 = 30 3 x 4 = 12 Fourth turn 3 x 2 = 6 5 x 1 = 5 Sum 10 + 12 + 30 + 6 Sum 4 + 15 + 12 +5 3 Now the second player spins and records loops and shapes. He or she also writes the multiplication fact on the record sheet. 52 + 6 = 58 16 + 20 = 36 5 The player with the highest total wins. Bridges in Mathematics 81
Home Connection 13 Activity (cont.) Loops & Groups Spinners 6 5 1 4 2 3 Loops Spinner Shapes Spinner 82 Bridges in Mathematics
NAME Home Connection 13 Activity (cont.) DATE Loops & Groups Record Sheet Partner 1 First turn Partner 2 First turn Second turn Second turn Third turn Third turn Fourth turn Fourth turn Sum Sum Bridges in Mathematics 83
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NAME DATE Home Connection 13 H Worksheet NOTE TO FAMILIES This worksheet gives students practice with multiplication in familiar contexts. Multiply by 4 & 8 1 Fill in the missing numbers. Also write an equation for each picture. example 1 skateboard has 4 wheels. 1 x 4 = 4 example 2 skateboards have 8 wheels. _2 x 4 = 8 a 3 skateboards have wheels. b 4 skateboards have wheels. c 5 skateboards have wheels. d 10 skateboards have wheels. 2 What patterns did you notice? _ Continued on back. Bridges in Mathematics 85
Home Connection 13 Worksheet (cont.) 3 Fill in the missing numbers. Also write an equation for each picture. example 1 octopus has 8 legs. 1 x 8 = 8_ example 2 octopuses have 16 legs. 2 x 8 = 16 a 3 octopuses have legs. b 4 octopuses have legs. c 5 octopuses have legs. d 10 octopuses have legs. 4 What patterns did you notice? 86 Bridges in Mathematics
Home Connection 14 H Activity NOTE TO FAMILIES This game is based on the area model for multiplication. In the area model, the dimensions (height and length) of a rectangle (also called an array) are multiplied to find the total area of the rectangle. We call the dimensions the factors, and the total area is the product of those two factors. 4 dimensions area 3 12 3 x 4 = 12 factors product In the game, both players draw a card showing an array on a grid. They both figure out the product or total area, and then the player with the larger product or area keeps both cards. The player with the most cards at the end of the game wins. The game is yours to keep at home, but your child will need to complete the worksheet and return it to school. To play, you ll need a deck of s. Instructions for Multiplication Challenge 1 Put the deck of cards in a stack, face down. Decide who will go first. 2 The first player turns over the top card. He or she says the multiplication fact the array shows. For example, Five times four equals twenty. 3 The second player turns over a card and does the same. The player with the greatest product wins both cards. 4 If both players have the same product, they each draw a second card. The player with the greatest product wins all four cards. 5 When there are no cards left, players count their cards. The player with the most cards wins. 5 x 4 = 20 7 x 6 = 42 Mine is greater. Bridges in Mathematics 87
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Home Connection 14 Activity (cont.) s page 1 of 3 Cut out cards along solid lines. Bridges in Mathematics 89
90 Bridges in Mathematics
Home Connection 14 Activity (cont.) s page 2 of 3 Cut out cards along solid lines. Bridges in Mathematics 91
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Home Connection 14 Activity (cont.) s page 3 of 3 Cut out cards along solid lines. Bridges in Mathematics 93
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NAME DATE Home Connection 14 H Worksheet NOTE TO FAMILIES This worksheet will give your child practice multiplying by 1, 2, 5, and 10. Multiplying by 1, 2, 5 & 10 Complete as many of these facts as you can. Can some facts help you figure out other facts you don t know right away? 4 5 2 6 10 1 1 6 5 8 8 7 6 2 9 5 4 5 10 7 1 4 10 9 10 5 7 2 1 2 5 5 1 4 10 5 10 2 9 3 10 8 2 1 5 5 1 2 5 9 10 7 1 2 2 10 5 Bridges in Mathematics 95
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NAME DATE Home Connection 15 H Activity NOTE TO FAMILIES This activity is designed to help your child find out more about ounces and pounds. If you don t have scales (e.g., bathroom scales or food scales), limit your investigation to the kitchen where many food items are labeled with their weights. If you have scales, you could look for a variety of things that you think might weigh about an ounce, a pound, or more than 5 pounds, and then use your scales to find out how close you were. Instructions for Weight Measures 1 Find at least three things in your home that weigh about a pound. Remember that a pound is equal to 16 ounces (but not fluid ounces). Hold the objects so you can feel how heavy a pound is. Record your objects in the table below. 2 Now try to find at least three objects that weigh 5 pounds or more. Pick up those objects so you can feel their weight. Record the objects on the table below. 3 Finally, find three things that weigh about an ounce. Remember, there are 16 ounces in a pound. Things that weigh about a pound (16 ounces) Things that weigh 5 pounds or more Things that weigh about an ounce a package of oatmeal a bag of potatoes a snack-size bag of chips Continued on back. Bridges in Mathematics 97
NAME DATE Home Connection 15 H Worksheet Comparing Pet Weights Here are the average weights of some common pets. Use the chart to answer the questions below. Remember that there are 16 ounces in 1 pound. Kind of Pet cat bird hamster gerbil small dog medium dog large dog Average Weight 11 pounds 3 ounces 3 ounces 2 ounces 10 pounds 45 pounds 80 pounds 1 Which pet is the heaviest? 2 Which pet is the lightest? 3 Name something else that weighs about the same as a pet bird. 4 What else do you notice about the data? 98 Bridges in Mathematics
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
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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. 4 3 2 6 2 2 2 9 5 3 8 0 1 2 10 2 5 2 8 3 2 1 2 9 2 6 10 3 4 7 2 7 2 3 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 = 20 10 = 15 5 = 24 8 = 6 3 = Continued on back. Bridges in Mathematics 101
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 8 4 10 5 2 9 4 8 4 0 8 7 3 10 4 1 8 4 8 4 6 8 7 6 5 4 8 4 8 9 8 4 8 2 8 4 4 8 6 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 = 40 10 = 28 7 = 16 2 = 40 5 = 102 Bridges in Mathematics