1 / 24

Factors and Multiples

Factors and Multiples. Mrs. Carter 4 th grade math. Factor. Factors are numbers that are multiplied 8 X 8 = 64. All numbers greater than 1 has 1 and itself as a factor. What are the factors of 27?. 27 1 X 27 = 27 3 X 9 = 27 27: 1, 3, 9, 27 (Write the factors least to greatest).

randy
Download Presentation

Factors and Multiples

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Factors and Multiples Mrs. Carter 4th grade math

  2. Factor Factors are numbers that are multiplied 8 X 8 = 64

  3. All numbers greater than 1 has 1 and itself as a factor

  4. What are the factors of 27? 27 1 X 27 = 27 3 X 9 = 27 27: 1, 3, 9, 27 (Write the factors least to greatest)

  5. practice Find the factors. • 18 • 24 • 21 • 52

  6. Common Factor Factors that two or more numbers have in common

  7. What are the common factors of 16 and 24? 16 1 X 16 = 16 2 X 8 = 16 4 X 4 = 16 Once you repeat a number you’re done!! 24 1 X 24 = 24 2 X 12 = 24 3 X 8 = 24 4 X 6 = 24

  8. Practice What are the common factors of: • 6, 9 • 24, 48 • 25, 45

  9. Greatest Common Factor The greatest factor that both numbers have in common. GCF

  10. Find the GCF 9 1 X 9 = 9 3 X 3 = 9 9 : 1,3,9 12 1 X 12 = 12 2 X 6 = 12 3 X 4 = 12 12: 1,2,3,4,6,12

  11. Practice Find the GCF • 12,26 • 9,21

  12. White board Practice List the factors • 36 • 18 • 27 List the common factors • 18,22 • 52,36 • 14, 9 List the GCF • 25, 40 • 30, 42

  13. Independent Practice MB pg. 112 #s 11-18 And Pg. 113 #s 36-43

  14. Multiple Multiples form a skip counting pattern! • Ex. 15 is a multiple of 5 because it is made up of 3 groups of 5.

  15. Use the inverse operation of multiplication, Division To find multiples!

  16. List the multiples of 7 up to 42. 7: 0, 7, 14, 21, 28, 35, 42

  17. Is 108 a multiple of 6? Strategy:Use a division number sentence. 108 ÷ 6= (if the quotient is a whole number then 6 is a multiple.) Solution: Yes, 108 is a multiple of 6 because 108 ÷ 6= 18

  18. Practice Find 10 multiples of: • 3 • 8 • 11

  19. Common Multiple A multiple that 2 or more numbers have in common.

  20. Is 36 a common multiple of 6 and 9? What strategy would you use? That’s Right! Division 36 ÷ 6= ? 36 ÷ 9=? Yes, 36 is a common multiple of 6 and 9.

  21. Practice • Is 42 a common multiple of 6 and 9? List 10 multiples of each number and circle the common multiples. 2. 3,6 3. 4, 12 4. 2, 5

  22. Least Common Multiple The lowest multiple that both numbers have in common. LCM EX. What is the LCM of 12 and 24? Strategy: List the multiples of 12 and 24. 12:12,24 24: 24

  23. White board Practice List the first 5 multiples of each number. • 2 • 4 3. Name the LCM of the following numbers: 20 and 5 4. How many common multiples less than 50 do 8 and 9 have? Name them

  24. Independent Practice MB pg. 112 #s 19-26 And MB pg. 113 #s 44-52

More Related