Math 7 · Unit 4: Decimals · Cambridge Lower Secondary Maths Stage 7

Questions

1. 1. Question 1a: fill in the missing number in the pattern 200 × 4 = 800, 20 × 4 = 80, 2 × 4 = ☐, 0.2 × 4 = 0.8.

   • 80
   • 0.8
   • 8
   • 6
   Check

2. 2. Question 1b: in the pattern 300 × 2 = 600, 30 × 2 = ☐, 3 × 2 = 6, 0.3 × 2 = ☐, what are the missing numbers?

   • 60 and 0.6
   • 60 and 0.06
   • 6 and 0.6
   • 600 and 6
   Check

3. 3. Question 1c: in the pattern 500 × 3 = 1500, 50 × 3 = ☐, 5 × 3 = ☐, 0.5 × 3 = 1.5, what are the missing numbers?

   • 150 and 15
   • 150 and 1.5
   • 1500 and 150
   • 15 and 1.5
   Check

4. 4. Question 1d: complete the pattern 700 × 5 = 3500, 70 × 5 = ☐, 7 × 5 = ☐, 0.7 × 5 = ☐.

   • 35, 3.5, 0.35
   • 350, 35, 0.35
   • 3500, 350, 35
   • 350, 35, 3.5
   Check

5. 5. Question 1e: complete the pattern 900 × 2, 90 × 2, 9 × 2, 0.9 × 2.

   • 1800, 180, 18, 0.18
   • 1800, 180, 18, 1.8
   • 1100, 92, 11, 2.9
   • 180, 18, 1.8, 0.18
   Check

6. 6. Question 1f: complete the pattern 600 × 7, 60 × 7, 6 × 7, 0.6 × 7.

   • 3600, 360, 36, 3.6
   • 420, 42, 4.2, 0.42
   • 4200, 420, 42, 4.2
   • 4200, 420, 42, 0.42
   Check

7. 7. Which of these is a correct number pattern, like those in Question 1?

   • 400 × 3 = 1200, 40 × 3 = 120, 4 × 3 = 12, 0.4 × 3 = 1.2
   • 600 × 4 = 2400, 60 × 4 = 240, 6 × 4 = 24, 0.6 × 4 = 24
   • 400 × 3 = 1200, 40 × 3 = 12, 4 × 3 = 120, 0.4 × 3 = 1.2
   • 400 × 3 = 1200, 40 × 3 = 120, 4 × 3 = 12, 0.4 × 3 = 12
   Check

8. 8. Copy and complete this working. 0.3 × 6. First work out 3 × 6 = 18, so 0.3 × 6 = ?

   • 1.8
   • 18
   • 9
   • 0.18
   Check

9. 9. Question 3b: work out 0.2 × 8. First work out 2 × 8.

   • 10
   • 0.16
   • 1.6
   • 16
   Check

10. 10. Question 3c: work out 0.4 × 4. First work out 4 × 4.

    • 16
    • 0.8
    • 0.16
    • 1.6
    Check

11. 11. Question 3d: work out 0.7 × 9.

    • 0.63
    • 6.3
    • 7.9
    • 63
    Check

12. 12. Question 3e: work out 0.5 × 5.

    • 2.5
    • 5.5
    • 25
    • 0.25
    Check

13. 13. Copy and complete this number pattern.

    Fill the blanks with these.

    • 3
    • 4.5
    • 0.35
    • 5.5
    • 2
    • 3.5
    • 2.5
    • 4
    • 5
    Check

14. 14. Use the grid to help you work out 3.2 × 7. The grid shows 32 × 7. What is 3.2 × 7?

    • 21.4
    • 2.24
    • 22.4
    • 224
    Check

15. 15. Question 5b: work out 4.5 × 2.

    • 8
    • 9
    • 0.9
    • 90
    Check

16. 16. Question 5c: work out 2.4 × 3.

    • 72
    • 0.72
    • 6.2
    • 7.2
    Check

17. 17. Question 5d: work out 4.6 × 4.

    • 184
    • 18.4
    • 18.3
    • 19.4
    Check

18. 18. Question 5e: work out 8.9 × 5.

    • 45.5
    • 445
    • 44.5
    • 44.4
    Check

19. 19. Question 5f: work out 9.2 × 2.

    • 18.4
    • 19.4
    • 184
    • 18.3
    Check

20. 20. Use a mental method to work out 0.3 × 2.

    • 0.06
    • 0.6
    • 0.5
    • 6
    Check