Math 9 · Unit 1: Number and calculation · Cambridge Lower Secondary Maths Stage 9

Questions

1. 1. Write 7⁻¹ as a fraction.

   • −7
   • 1/7
   • 7
   • 1/49
   Check

2. 2. Write 7⁻² as a fraction.

   • −14
   • −49
   • 1/14
   • 1/49
   Check

3. 3. Write 5⁻³ as a fraction.

   • 1/125
   • 1/15
   • −15
   • −125
   Check

4. 4. Write 3⁻⁴ as a fraction.

   • 1/81
   • 1/12
   • −81
   • −12
   Check

5. 5. Write 15⁻² as a fraction.

   • −30
   • −225
   • 1/225
   • 1/30
   Check

6. 6. Write 20⁻² as a fraction.

   • −400
   • 1/400
   • −40
   • 1/40
   Check

7. 7. Write 1/4 as a power of 4.

   • 4⁻⁴
   • 4¹
   • 4⁰
   • 4⁻¹
   Check

8. 8. Write 1/64 as a power of 4.

   • 4⁻¹⁶
   • 4³
   • 4⁻²
   • 4⁻³
   Check

9. 9. Write 1 as a power of 4.

   • 4⁻¹
   • 4⁰
   • 4¹
   • 4⁻²
   Check

10. 10. Write 256 as a power of 4.

    • 4⁻⁴
    • 4⁶⁴
    • 4⁴
    • 4³
    Check

11. 11. Write 1/256 as a power of 4.

    • 4⁻³
    • 4⁴
    • 4⁻⁴
    • 4⁻⁶⁴
    Check

12. 12. Write 16⁻¹ as a power of 4.

    • 4⁻¹
    • 4⁻⁴
    • 4⁻²
    • 4²
    Check

13. 13. Write 0.2 as a power of 5.

    • 5⁰
    • 5⁻¹
    • 5¹
    • 5⁻²
    Check

14. 14. Write 25 as a power of 5.

    • 5²
    • 5⁵
    • 5³
    • 5⁻²
    Check

15. 15. Write 0.04 as a power of 5.

    • 5⁻¹
    • 5⁻⁴
    • 5⁻²
    • 5²
    Check

16. 16. Write 125⁻¹ as a power of 5.

    • 5⁻¹²⁵
    • 5⁻³
    • 5³
    • 5⁻¹
    Check

17. 17. Write 15⁰ as a power of 5.

    • 5³
    • 5⁰
    • 5⁻³
    • 5¹
    Check

18. 18. Find the value of x⁻³ when x = 2.

    • 1/6
    • 1/8
    • −6
    • −8
    Check

19. 19. Find the value of x⁻³ when x = 3.

    • −9
    • −27
    • 1/9
    • 1/27
    Check

20. 20. Find the value of x⁻³ when x = 5.

    • −15
    • −125
    • 1/125
    • 1/15
    Check