1 / 12

Ministry of Education Secondary Numeracy Project

Ministry of Education Secondary Numeracy Project. Algebra in Multiplication. Kevin Hannah Central Auckland Airport Hotel 23-24 February 2005. Algebra in Multiplication. Computing using the distributive law Recognising structure in numbers Exploring algebraic expressions.

vince
Download Presentation

Ministry of Education Secondary Numeracy Project

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. Ministry of EducationSecondary Numeracy Project Algebra in Multiplication Kevin Hannah Central Auckland Airport Hotel 23-24 February 2005

  2. Algebra in Multiplication • Computing using the distributive law • Recognising structure in numbers • Exploring algebraic expressions

  3. What’s the answer? 7 x 98 How did you do it? 7 x 98 = 7 x 100 - 7 x 2

  4. What’s the answer? 597 x 5 How did you do it? 597 x 5 = 600 x 5 - 3 x 5

  5. What’s the answer? 407 x 8 How did you do it? 407 x 8 = 400 x 8 + 7 x 8

  6. Are these correct? 7 x 98 = 7 x 100 - 7 x 2 915 x 8 = 900 x 8 + 15 x 8 597 x 11 = 600 x 11 - 3 x 7 3x(400-8) = 3x400 - 3x8

  7. Are these correct? 8 x 300 - 7 x 8 = 8 x 293 80 x 7 - 5 x 7 = 85 x 7 79 x 11 = 70 x 11 +9x9 12x40 - 8x12= 8x(40-12)

  8. 6 x 600 + 7 x 6 = 6 x 607 80 x 6 - 6 x 6 = 74 x 6 58 x 13 = 50 x 13 + 8 x 13 5x(70-2) =5x70 - 5x 12 What’s missing?

  9. 6 ( m + 7) = 6m + 42 8c - 48 = 8(c - 6) 7 ( m + 9 ) = 7m + 63 5(y-2) =5y - 10 Fill in the gaps

  10. 5 ( y + 6) = 5y + 30 7(x - 10) = 7x - 70 4 ( 2m + 3 ) = 8m + 12 6(3r-9) = 18r - 54 Expand

  11. 3 ( n + 2) = 3n + 6 8(x - 4) = 8x - 32 5 ( 4p + 3 ) = 12p + 15 7(6 - 5y) = 42 - 35y Factorise

  12. Recognising Structure a(b ± c) = ab ± ac

More Related