1 / 33

Bellringer – Name the property

Bellringer – Name the property. (9 + 8) + 7 = 9 + (8 + 7). The Associative Property of Addition. 12 + 0 = 12. The Identity Property of Addition. 9 + 7 = 7 + 9. The Commutative Property of Addition. Go Over Homework. Textbook page 10-11, problem 8-40 even show all your work

lan
Télécharger la présentation

Bellringer – Name the property

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. Bellringer – Name the property (9 + 8) + 7 = 9 + (8 + 7) The Associative Property of Addition 12 + 0 = 12 The Identity Property of Addition 9 + 7 = 7 + 9 The Commutative Property of Addition

  2. Go Over Homework Textbook page 10-11, problem 8-40 even show all your work Skip Problem #34

  3. Multiply Decimals Chapter 1, Section 3

  4. Four Properties of Multiplication • Commutative • Associative • Identity • Zero Property

  5. Communative Property of Multiplication Commuter B Commuter A A x B = B x A. Remember… commute means to change. Commuter A Commuter B

  6. The Commutative Property A x B = B x A

  7. Changing the order of the factors does not change the product A x B = B x A 1 x 2 x 3 = 3 x 1 x 2 4 x 5 x 6 = 5 x 6 x 4 Commutative Property of Multiplication

  8. Four Properties of Multiplication • Commutative • Associative • Identity • Zero Property

  9. A C B A C B The Associative Property The parentheses identify which two associates talked first. (A x B)x C = A x (B x C) THEN THEN

  10. Changing the grouping of the factors does not change the product . (1 x 2) x 3 = 1 x ( 2 x 3) (A x B) x C = A x ( B x C) (4 x 5) x 6 = 4 x ( 5 x 6 ) Associative Property of Multiplication

  11. Four Properties of Multiplication • Commutative • Associative • Identity • Zero Property

  12. Identity Property of Multiplication A x 1 = A x 1 =

  13. The product of one and anything is anything 1 x 3 = 3 1 x C = C 18 x 1 = 18 Identity Property of Multiplication

  14. Four Properties of Multiplication • Commutative • Associative • Identity • Zero Property

  15. Zero Property of Multiplication A x 0 = 0 x 0 = 0

  16. The product of zero and anything is zero 3 x 0 = 0 0 x C = 0 18 x 0 =0 Zero Property of Multiplication

  17. Let’s practice ! Look at the problem. Identify which property it represents.

  18. (9 x 8) x 7 = 9 x (8 x 7) The Associative Property

  19. 12 x 0 = 0 Zero Property

  20. 3 x1 = 3 The Identity Property

  21. 9 x 7 = 7 x 9 The Commutative Property

  22. 4 x1 = 4 Identity Property Numbers change places.

  23. (4 x 3) x 2 = 4 x (3 x 2) The Associative Property It has parentheses!

  24. a x b = b x a The Commutative Property Moving numbers!

  25. a x 0 = 0 Zero Property

  26. A C B (a x b) x c = a x (b x c) The Associative Property Parentheses!

  27. Multiplying Decimals - Steps 4 . 32 x 0.012 *** Place values do NOT need to line up, but digits do!!! 1. Write the Problem

  28. Multiplying Decimals - Steps 4 . 32 x 0.012 2. Pretend decimals are not there!

  29. Multiplying Decimals - Steps 4 . 32 x 0.012 864 + 4320 00000 05184 3. Multiply

  30. Multiplying Decimals - Steps 4 . 32 x 0.012 2 places 3 places 864 + 4320 00000 5 total places!! 05184 Count total number of places behind ALL Decimals

  31. Multiplying Decimals - Steps 4 . 32 x 0.012 864 + 4320 00000 05184 . 05184 Place decimal that many places left.

  32. Textbook pg. 16 #1-10 & 20 together 3.41

  33. Homework Time Textbook page 16, problem 12-30 even show all your work 12- 18 do not estimate, give exact answer 30 show work (not extra credit)

More Related