1 / 21

Mastering Integers: Adding and Subtracting with Number Lines

Learn adding and subtracting integers using number lines with positive and negative integers. Practice exercises included to strengthen understanding.

sgoodwin
Download Presentation

Mastering Integers: Adding and Subtracting with Number Lines

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. KS3 Mathematics N2 Negative numbers

  2. N2 Negative numbers • A Contents N2.2 Adding and subtracting integers

  3. Multiplying and dividing integers – Starter –3 × 8 = –36 ÷ = –4 42 ÷ = –6 ÷ –9 = –6 × –8 = 88 –7 × = 105 –4 × –5 × –8 = 47 × = 94 –72 ÷ –6 = 3 × –8 ÷ = 2.4 Starter - Complete the following: –24 9 –7 54 –11 –15 –160 2 –10 12

  4. Adding integers We can use a number line to help us add positive and negative integers. –2 + 5 = = 3 -2 3 To add a positive integer we move forwards up the number line.

  5. Adding integers We can use a number line to help us add positive and negative integers. –3 + –4 = = –7 -7 -3 To add a negative integer we move backwards down the number line. –3 + –4 is the same as –3 – 4

  6. Subtracting integers We can use a number line to help us subtract positive and negative integers. 5 – 8 = = –3 -3 5 To subtract a positive integer we move backwards down the number line.

  7. Subtracting integers We can use a number line to help us subtract positive and negative integers. 3 – –6 = = 9 3 9 To subtract a negative integer we move forwards up the number line. 3 – –6 is the same as 3 + 6

  8. Subtracting integers We can use a number line to help us subtract positive and negative integers. –4 – –7 = = 3 -4 3 To subtract a negative integers we move forwards up the number line. –4 – –7 is the same as –4 + 7

  9. Adding and subtracting integers summary To add a positive integer we move forwards up the number line. To add a negative integer we move backwards down the number line. a + –b is the same as a – b. To subtract a positive integer we move backwards down the number line. To subtract a negative integer we move forwards up the number line. a – –b is the same as a + b.

  10. Exercise A • Work out the following • –5 + 7 • – 3 + 5 • – 6 + 9 • 4 – 6 • +5 – 6 • 4 – 10 • 2 – 6 • 3 – 3 • 3 – 6 • – 2 – 3 • – 3 – 3 • 0 – 5 • 1 + 4 – 6 • 5 – 11 – 2 • – 8 + 6

  11. Exercise B • Work out the following • – 8 + 9 • – 6 + 10 • – 2 + 8 • 0 – 8 • 3 – 10 • 8 – 10 • 7 – 9 • 4 – 10 • 5 – 9 • – 8 + 8 • 6 – 12 – 4 • 7 – 10 + 3 • – 3 + 10 – 7 • 6 – 12 + 6 • 8 – 16 – 3

  12. Exercise C • Work out the following • 4 + – 2 • 2 + – 3 • 4 – –2 • 5 – – 4 • 15 – – 3 • 4 – – 6 • – 9 – – 5 • – 10 + – 7

  13. Exercise D Ten Ticks. Level 5. Pack 4. Page 3

  14. Exercise E Ten Ticks. Level 5. Pack 4. Page 3

  15. Ordered addition square Copy the grid and work out the numbers in the empty squares

  16. Mixed addition square Copy the grid and work out the numbers in the empty squares

  17. Ordered subtraction square Copy the grid and work out the numbers in the empty squares

  18. Mixed subtraction square Copy the grid and work out the numbers in the empty squares

  19. Complete this table

  20. Integer cards - addition and subtraction Complete the sums

  21. Adding and subtracting integers summary To add a positive integer we move forwards up the number line. To add a negative integer we move backwards down the number line. a + –b is the same as a – b. To subtract a positive integer we move backwards down the number line. To subtract a negative integer we move forwards up the number line. a – –b is the same as a + b.

More Related