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MATH UNIT 2 RECALLING MULTIPLICATION FACTS

MATH UNIT 2 RECALLING MULTIPLICATION FACTS. 4 TH GRADE. Choose the best term from the box. breaking apart product factor multiples In the number sentence 8 x 3 = 24, 8 is a _____. In the number sentence 2 x 6 = 12, 12 is a_____.

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MATH UNIT 2 RECALLING MULTIPLICATION FACTS

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  1. MATH UNIT 2RECALLING MULTIPLICATION FACTS 4TH GRADE

  2. Choose the best term from the box. breaking apart product factor multiples In the number sentence 8 x 3 = 24, 8 is a _____. In the number sentence 2 x 6 = 12, 12 is a_____. 191 + 67 = ( 191 + 9) + 58 is an example of using the _____ strategy.

  3. Skip Counting

  4. Look at each array. Circle groups of 3. What multiplication fact does each array represent?

  5. Nicholas is thinking of a whole number. He multiplies the number by 5, but the resulting answer is less than 5. What number is he thinking about?

  6. 2-1 Patterns for Facts

  7. What are the patterns for multiples of 2, 5, and 9 ? * A MULTIPLE is the product of any two whole numbers. To find multiples of 2 all you need to do is skip count by 2s. To find multiples of 5 all you need to do is skip count by 5s. To find multiples of 9 all you need to do is skip count by 9s.

  8. Skip count to find the number that comes next. 20, 25, 30, ____ 36, 45, 54, ____ 99, 88, 77, ____ 1, 8, 15, ____ 15, 30, 45, ____

  9. Find the product. * A PRODUCT is the answer to a multiplication problem.

  10. How do you know that 13 is not a multiple of 2? __________________ What are all of the multiples of 2 up to 20?

  11. Alyssa is sorting socks for her mom. She has 9 pairs of socks. How many socks does she have in all?

  12. While most species of starfish have 5 arms, some species can have up to 40 arms. How many arms do 9 starfish have? _______ How many arms would 6 starfish have? _______ How many arms would 7 starfish have? _______

  13. Grace is working on her model train set. She adds 9 pieces of track. Each piece of track is attached with 4 screws. How many screws will she need to attach the track? Write the equation and solve.

  14. Which is equal to 9 dollars and • nickels? ______ + ______ = $______ What is equal to 17 dollars and 12 dimes? ______ + ______ = $______

  15. In wheelchair basketball, players use sports chairs that have 2 large wheels and 3 small wheels each. If there are 5 players, how many… Large wheels? _____ Small wheels? _____ Large and Small wheels? _____ _____ + _____ = _____

  16. Each pentagon shown below has • sides. How many sides are there in all? Strategy: skip count by 5s. Write the equation (multiplication sentence) _____ x _____ = _____

  17. CHALLENGE Can you write a 3 digit number that when it is rounded to the nearest ten or to the nearest hundred the answer is the same?

  18. 2 – 2 Multiplication Properties

  19. Multiplication Properties How can properties help you multiply? Commutative Property of Multiplication means that two numbers can be multiplied in any order and the product will be the same.

  20. Zero Property of Multiplication Any number multiplied by zero = zero • groups of 0 2 x 0 = 0

  21. Identity Property of Multiplication The product of any number and one is that number. • Group of 7 1 X 7 = 7

  22. In a soccer tournament, Ava’s team scored zero goals in each game. They played a total of 6 games. Write a multiplication sentence to show how many goals they scored in all.

  23. Find each product.

  24. Taylor has 6 packages of tennis balls. How many packages of golf balls would Taylor need so that she has an equal number of golf balls and tennis balls?

  25. If Brianna and three of her friends each bought one package of baseballs, how many baseballs do they have in all?

  26. Ryan scored 4 goals in each of • soccer games. His friend Tyler scored 3 goals in each of 4 soccer games. Who scored the most goals? Explain.

  27. Mrs. B has 27 students in her ESOL class. She wants to rearrange the desks in equal groups. If the desks are in 9 groups of 3 desks now, what are other ways that she could arrange the desks?

  28. Draw different arrays to show arrangements of 24 desks.

  29. 2 - 3

  30. Use known facts: • and 4 as FACTORS James is replacing the wheels on • skateboards. How many wheels does he need in all? Use the DISTRIBUTIVE PROPERTY to break apart facts into simpler problems.

  31. Find 10 x 4 Break the equation apart into (5 x 4) + (5 x 4) So 10 x 4 = ____ or (10 x 3) + (10 x 1) So 10 x 4 = ____

  32. Use breaking apart to find each product.

  33. The manatee is an endangered sea mammal. A mother manatee is three times as long as her baby. How long is the baby manatee if the mother is 12 feet long?

  34. John, Noah, and their dads went to the movies. Each ticket cost $7. They also each spent $4 on snacks. How much money did they all spend at the movies?

  35. In his last basketball game, Brandon scored 15 points. Which of the following is NOT a possible way he could have scored his points?

  36. Lauren scored 6 two-point baskets and 6 one-point free throws. Chloe scored 6 three-point baskets. Explain how you know each girl scored the same total points in the game.

  37. A botanist is growing a four-petal pawpaw shrub. He counted 9 flowers on the shrub. Which uses breaking apart to find the total number of petals on the pawpaw?

  38. Using Know Facts: 6, 7, and 8 as FACTORS Are there different ways to break apart a fact? Mrs. B’s class drew a map of their town. The map is 6 blocks by 6 blocks. How many square blocks are on the map?

  39. To break these apart we could say that 6 rows of 6 is the same as 5 rows of 6 and 1 row of 6. So 5 x 6 = _____ Plus 1 x 6 = _____ So 6 x 6 = _____

  40. Break them apart.

  41. Natalie and Kayla are playing chess. Write a multiplication sentence to find the total number of squares on the chessboard.

  42. Jessica, Anna, and Victoria are taking a hiking vacation. They traveled the distances shown in the table. Who walked the farthest?

  43. Mark Twain’s name is taken from riverboat slang. “Mark twain” means “Mark two” for 2 fathoms. One fathom is equal to 6 feet. How many feet does Mark Twain’s name stand for?

  44. 2 - 5

  45. Recalling Multiplication Facts What are some strategies that can be used to find products? Christian visited a summer camp that has 7 tents for the campers to stay in. Five campers are assigned to each tent. If all of the tents are full, how many campers are at the camp?

  46. Find the products.

  47. Find the products.

  48. Mia says that she can use the fact 3 x 6 = 18 to find 7 x 6. Is she correct? Explain her thinking.

  49. Dylan has 9 cases to keep CDs in. He wants to put 8 CDs in each case. Draw a bar diagram to find how many CDs his cases will hold.

  50. Hailey collects Temari balls. Temari balls originated in China and were brought to Japan over one thousand years ago. Hailey arranges the balls into 3 rows with 8 balls in each row. What is another way she can arrange her collection into equal groups?

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