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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 484 · 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 × 36 =
  2. 2.55 × 6 =
  3. 3.6 × 75 =
  4. 4.25 × 24 =
  5. 5.25 × 28 =
  6. 6.35 × 22 =
  7. 7.25 × 24 =
  8. 8.35 × 14 =
  9. 9.125 × 14 =
  10. 10.15 × 6 =
  11. 11.25 × 24 =
  12. 12.25 × 24 =
  13. 13.65 × 12 =
  14. 14.8 × 55 =
  15. 15.14 × 75 =
  16. 16.28 × 15 =
  17. 17.18 × 25 =
  18. 18.35 × 24 =
  19. 19.36 × 75 =
  20. 20.25 × 38 =
  21. 21.55 × 28 =
  22. 22.75 × 18 =
  23. 23.65 × 38 =
  24. 24.125 × 22 =
  25. 25.24 × 125 =
  26. 26.45 × 6 =
  27. 27.75 × 22 =
  28. 28.25 × 12 =
  29. 29.16 × 35 =
  30. 30.36 × 45 =
  31. 31.75 × 32 =
  32. 32.22 × 45 =
  33. 33.20 × 15 =
  34. 34.35 × 12 =
  35. 35.55 × 38 =
  36. 36.24 × 45 =
  37. 37.55 × 38 =
  38. 38.16 × 75 =
  39. 39.40 × 45 =
  40. 40.15 × 40 =

Answer key

  1. 1620
  2. 330
  3. 450
  4. 600
  5. 700
  6. 770
  7. 600
  8. 490
  9. 1750
  10. 90
  11. 600
  12. 600
  13. 780
  14. 440
  15. 1050
  16. 420
  17. 450
  18. 840
  19. 2700
  20. 950
  21. 1540
  22. 1350
  23. 2470
  24. 2750
  25. 3000
  26. 270
  27. 1650
  28. 300
  29. 560
  30. 1620
  31. 2400
  32. 990
  33. 300
  34. 420
  35. 2090
  36. 1080
  37. 2090
  38. 1200
  39. 1800
  40. 600

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