1 / 14

Week 6

*sign in! (are you here?). Week 6. Warm up Problem: Without doing any calculation, explain why 35 base 7 > 35 base 6. Agenda. Discuss Exams Multiplication Models Begin Exploration 3.13 Assign Homework. 4 feet. 2 feet. Meanings for Multiplication. Repeated addition:

masako
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. *sign in! (are you here?) Week 6 Warm up Problem: Without doing any calculation, explain why 35 base 7 > 35 base 6.

  2. Agenda • Discuss Exams • Multiplication Models • Begin Exploration 3.13 • Assign Homework

  3. 4 feet 2 feet Meanings for Multiplication • Repeated addition: • 3 • 4 = 4 + 4 + 4 = 12 • 4 • 3 = 3 + 3 + 3 + 3 = 12 • Area: 4 • 2 =

  4. Shirt 1 Shirt 2 Shirt 3 J B R K C J B R K C J B R K C Meanings for Multiplication • Measured Units: 5 times x units long • Cartesian Product: combinations e.g., 3 shirts, 5 pair pants

  5. Meanings for Multiplication • Arrays: 3 • 5

  6. Meanings for Multiplication • Rate: 8 miles per hour for 5 hours: • 8 • 5 = 40 miles

  7. Exploration 3.13 • First, read through the Egyptian Duplation example. Focus on the Hindu-Arabic numerals. (You can ignore the Egyptian Numerals.) • With a partner, can you explain what is going on here?If so, can you explain why it works? • With your partner, see if you can do 14 • 41; 65 • 17; 18 • 37. Do not use a calculator!!

  8. Homework • Due Wednesday • Read Section 3.3 (up to page 178 – the multiplication algorithm) • Class Notes Packet 1. Do Children’s Thinking Activity 1 (pp. 1-3). Write your answers directly in the packet. • Due Friday • Exploration 3.13 1. Do Egyptian Duplation and Lattice Multiplication for the following problems:(a) 19 • 73 (b) 26 • 50 (c) 7 • 94 2. Try to write in words why mathematically each algorithm works.

More Related