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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 457 · 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. 1.36 × 45 =
  2. 2.40 × 125 =
  3. 3.25 × 32 =
  4. 4.35 × 36 =
  5. 5.15 × 34 =
  6. 6.6 × 55 =
  7. 7.28 × 65 =
  8. 8.15 × 8 =
  9. 9.35 × 32 =
  10. 10.75 × 32 =
  11. 11.40 × 125 =
  12. 12.45 × 24 =
  13. 13.15 × 28 =
  14. 14.8 × 45 =
  15. 15.28 × 125 =
  16. 16.34 × 75 =
  17. 17.35 × 6 =
  18. 18.55 × 14 =
  19. 19.30 × 35 =
  20. 20.6 × 25 =
  21. 21.75 × 30 =
  22. 22.14 × 15 =
  23. 23.35 × 12 =
  24. 24.25 × 10 =
  25. 25.45 × 40 =
  26. 26.125 × 32 =
  27. 27.35 × 22 =
  28. 28.65 × 18 =
  29. 29.35 × 12 =
  30. 30.10 × 65 =
  31. 31.45 × 14 =
  32. 32.55 × 12 =
  33. 33.14 × 65 =
  34. 34.65 × 10 =
  35. 35.45 × 8 =
  36. 36.34 × 35 =
  37. 37.32 × 25 =
  38. 38.55 × 32 =
  39. 39.35 × 40 =
  40. 40.75 × 16 =

Answer key

  1. 1620
  2. 5000
  3. 800
  4. 1260
  5. 510
  6. 330
  7. 1820
  8. 120
  9. 1120
  10. 2400
  11. 5000
  12. 1080
  13. 420
  14. 360
  15. 3500
  16. 2550
  17. 210
  18. 770
  19. 1050
  20. 150
  21. 2250
  22. 210
  23. 420
  24. 250
  25. 1800
  26. 4000
  27. 770
  28. 1170
  29. 420
  30. 650
  31. 630
  32. 660
  33. 910
  34. 650
  35. 360
  36. 1190
  37. 800
  38. 1760
  39. 1400
  40. 1200

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