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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 336 · 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. 1.10 × 55 =
  2. 2.15 × 14 =
  3. 3.18 × 35 =
  4. 4.40 × 65 =
  5. 5.125 × 36 =
  6. 6.28 × 15 =
  7. 7.24 × 55 =
  8. 8.125 × 14 =
  9. 9.35 × 20 =
  10. 10.75 × 32 =
  11. 11.34 × 55 =
  12. 12.38 × 15 =
  13. 13.20 × 35 =
  14. 14.125 × 18 =
  15. 15.35 × 6 =
  16. 16.35 × 8 =
  17. 17.36 × 25 =
  18. 18.38 × 15 =
  19. 19.125 × 36 =
  20. 20.15 × 22 =
  21. 21.22 × 15 =
  22. 22.6 × 15 =
  23. 23.55 × 24 =
  24. 24.6 × 25 =
  25. 25.32 × 55 =
  26. 26.14 × 65 =
  27. 27.65 × 22 =
  28. 28.20 × 65 =
  29. 29.18 × 125 =
  30. 30.15 × 40 =
  31. 31.24 × 55 =
  32. 32.55 × 40 =
  33. 33.16 × 125 =
  34. 34.14 × 35 =
  35. 35.20 × 75 =
  36. 36.36 × 25 =
  37. 37.14 × 65 =
  38. 38.125 × 12 =
  39. 39.20 × 45 =
  40. 40.26 × 15 =

Answer key

  1. 550
  2. 210
  3. 630
  4. 2600
  5. 4500
  6. 420
  7. 1320
  8. 1750
  9. 700
  10. 2400
  11. 1870
  12. 570
  13. 700
  14. 2250
  15. 210
  16. 280
  17. 900
  18. 570
  19. 4500
  20. 330
  21. 330
  22. 90
  23. 1320
  24. 150
  25. 1760
  26. 910
  27. 1430
  28. 1300
  29. 2250
  30. 600
  31. 1320
  32. 2200
  33. 2000
  34. 490
  35. 1500
  36. 900
  37. 910
  38. 1500
  39. 900
  40. 390

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