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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 836 · 40 questions
TalentJR

How it works (Double and halve): Find the number ending in 5 and the even number. Double the one ending in 5; halve the even one. Repeat while it helps (25 → 50 → 100), then multiply.

NameDateTime takenScore ___ / 40
  1. 1.45 × 8 =
  2. 2.40 × 25 =
  3. 3.35 × 18 =
  4. 4.35 × 20 =
  5. 5.25 × 28 =
  6. 6.125 × 38 =
  7. 7.45 × 28 =
  8. 8.28 × 25 =
  9. 9.28 × 45 =
  10. 10.15 × 36 =
  11. 11.65 × 38 =
  12. 12.75 × 6 =
  13. 13.25 × 14 =
  14. 14.55 × 40 =
  15. 15.20 × 15 =
  16. 16.45 × 24 =
  17. 17.35 × 22 =
  18. 18.32 × 35 =
  19. 19.25 × 8 =
  20. 20.15 × 38 =
  21. 21.10 × 25 =
  22. 22.55 × 40 =
  23. 23.65 × 10 =
  24. 24.6 × 125 =
  25. 25.25 × 28 =
  26. 26.32 × 65 =
  27. 27.8 × 45 =
  28. 28.6 × 25 =
  29. 29.25 × 10 =
  30. 30.40 × 125 =
  31. 31.15 × 36 =
  32. 32.125 × 22 =
  33. 33.8 × 55 =
  34. 34.36 × 45 =
  35. 35.45 × 38 =
  36. 36.22 × 15 =
  37. 37.15 × 22 =
  38. 38.75 × 20 =
  39. 39.125 × 16 =
  40. 40.15 × 20 =

Answer key

  1. 360
  2. 1000
  3. 630
  4. 700
  5. 700
  6. 4750
  7. 1260
  8. 700
  9. 1260
  10. 540
  11. 2470
  12. 450
  13. 350
  14. 2200
  15. 300
  16. 1080
  17. 770
  18. 1120
  19. 200
  20. 570
  21. 250
  22. 2200
  23. 650
  24. 750
  25. 700
  26. 2080
  27. 360
  28. 150
  29. 250
  30. 5000
  31. 540
  32. 2750
  33. 440
  34. 1620
  35. 1710
  36. 330
  37. 330
  38. 1500
  39. 2000
  40. 300

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