1 / 15

Week 6

Week 6. *sign in! (are you here?). Warm Up (wait on handing in class notes). Can you explain what is going on here? 15 • 24 =. Agenda. A note on class notes Homework for Exploration 3.13 Complete Exploration 3.13 Properties of Multiplication More Exploration 3.13 Assign Homework.

nariko
Download Presentation

Week 6

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. Week 6

  2. *sign in! (are you here?) Warm Up(wait on handing in class notes) • Can you explain what is going on here? 15 • 24 =

  3. Agenda • A note on class notes • Homework for Exploration 3.13 • Complete Exploration 3.13 • Properties of Multiplication • More Exploration 3.13 • Assign Homework

  4. Homework Due Friday and Monday Exploration 3.13. 1. Do Egyptian Duplation (F), Lattice and Lightning Cross Multiplication (M) for the following problems:(a)   19 • 73     (b)    26 • 50     (c)   7 • 94 2. Try to write in words why mathematically each algorithm works. 

  5. Exploration 3.13 • Use Egyptian Duplation for 14 • 41.

  6. Exploration 3.13 • 14 • 41: • 41 • 82 • 164 • 328 • 656 • Now: 14 • 41 = (2 + 4 + 8) • 41 = 82 + 164 + 328 = 574

  7. Exploration 3.13 • Use Egyptian Duplation for 65 • 17.

  8. Exploration 3.13 • Do this one with your partner: 65 • 17 • 65 • 130 • 260 • 520 • 1040 • 65 • 17 = 65 • (1 + 16) = 65 + 1040 = 1105

  9. Multiplication • Vocabulary: • A•B = C • A is the multiplier • B is the multiplicand • C is the product • A and B are factors • C is a multiple of A and B

  10. Properties of Multiplication • zero property • identity property • commutative • associative • distributive (links multiplication and addition together!)

  11. 4 5 2 8 0 8 1 0 3 2 4 0 1 2 6 0 Exploration 3.13 • Lattice Multiplication--this is used today in certain schools. Kids love this! • 45 • 28

  12. 4 5 2 8 0 8 1 0 3 2 4 0 1 2 6 0 Exploration 3.13 • With a partner, can you explain what is going on in Lattice Multiplication? • If so, can you explain why it works? • 45• 28

  13. 1 3 1 3 2 7 2 7 2 1 Exploration 3.13 • You try Lattice Multiplication for 27 • 13 thousands hundreds tens 2 7 ones 6 3 5 1

  14. Homework Due Friday and Monday Exploration 3.13. 1. Do Egyptian Duplation (F), Lattice and Lightning Cross Multiplication (M) for the following problems:(a)   19 • 73     (b)    26 • 50     (c)   7 • 94 2. Try to write in words why mathematically each algorithm works.  Write it up clearly, and be sure to explain the mathematics: For Egyptian Duplation, how the distributive property is involved. For Lattice Multiplication and Lightning Cross Multiplication be sure to explain how the place values are maintained.

  15. Homework--Due Wednesday • Section 3.3 pp. 186 - 189 1, 9, 12, 14b, 18, 19bd; 21, 42, 50, 53

More Related