Math 7 · Unit 1: Integers · Cambridge Lower Secondary Maths Stage 7

Questions

1. 1. Worked example: work out −5 + 9.

   • −4
   • −14
   • 14
   • 4
   Check

2. 2. Worked example: work out 2 − −5.

   • −3
   • 7
   • −7
   • 3
   Check

3. 3. Add these positive and negative integers. −3 + −4

   • 1
   • −7
   • 7
   • −1
   Check

4. 4. Add these positive and negative integers. 6 + −5

   • −11
   • 1
   • 11
   • −1
   Check

5. 5. Add these positive and negative integers. −7 + 2

   • −5
   • −9
   • 5
   • 9
   Check

6. 6. Add these positive and negative integers. −5 + 10

   • 5
   • 15
   • −5
   • −15
   Check

7. 7. Subtract these positive and negative integers. 4 − 6

   • −10
   • −2
   • 10
   • 2
   Check

8. 8. Subtract these positive and negative integers. −6 − 3

   • −9
   • 3
   • −3
   • 9
   Check

9. 9. Subtract these positive and negative integers. 1 − −8

   • 9
   • −9
   • −7
   • 7
   Check

10. 10. Subtract these positive and negative integers. −5 − −6

    • 1
    • 11
    • −1
    • −11
    Check

11. 11. Copy and complete this addition table.

    Fill the blanks with these.

    • −3
    • 2
    • −11
    • 6
    • −1
    • −2
    • 3
    Check

12. 12. Work out: 20 + −5

    • −15
    • 25
    • −25
    • 15
    Check

13. 13. Work out: −10 + −15

    • −5
    • 25
    • 5
    • −25
    Check

14. 14. Work out: −2 + −13

    • 15
    • 11
    • −11
    • −15
    Check

15. 15. Work out: −3 + 20

    • −23
    • 23
    • 17
    • −17
    Check

16. 16. Work out: 20 − −5

    • 25
    • −25
    • 15
    • −15
    Check

17. 17. Work out: −10 − −15

    • 5
    • −5
    • −25
    • 25
    Check

18. 18. Work out: −2 − −13

    • −15
    • 15
    • 11
    • −11
    Check

19. 19. Work out: −3 − 20

    • −23
    • 23
    • −17
    • 17
    Check

20. 20. Fill in the missing numbers. 8 + □ = 1

    • 9
    • −7
    • −9
    • 7
    Check