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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 585 · 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 × 15 =
  2. 2.40 × 75 =
  3. 3.8 × 35 =
  4. 4.25 × 38 =
  5. 5.15 × 36 =
  6. 6.40 × 65 =
  7. 7.6 × 25 =
  8. 8.22 × 15 =
  9. 9.18 × 55 =
  10. 10.24 × 75 =
  11. 11.12 × 55 =
  12. 12.55 × 36 =
  13. 13.20 × 125 =
  14. 14.40 × 25 =
  15. 15.125 × 38 =
  16. 16.34 × 125 =
  17. 17.35 × 14 =
  18. 18.65 × 24 =
  19. 19.15 × 14 =
  20. 20.32 × 25 =
  21. 21.10 × 35 =
  22. 22.28 × 25 =
  23. 23.18 × 75 =
  24. 24.65 × 14 =
  25. 25.35 × 28 =
  26. 26.45 × 8 =
  27. 27.15 × 18 =
  28. 28.25 × 16 =
  29. 29.22 × 45 =
  30. 30.6 × 15 =
  31. 31.55 × 16 =
  32. 32.14 × 65 =
  33. 33.16 × 45 =
  34. 34.25 × 10 =
  35. 35.75 × 24 =
  36. 36.38 × 45 =
  37. 37.35 × 10 =
  38. 38.20 × 75 =
  39. 39.125 × 32 =
  40. 40.32 × 125 =

Answer key

  1. 150
  2. 3000
  3. 280
  4. 950
  5. 540
  6. 2600
  7. 150
  8. 330
  9. 990
  10. 1800
  11. 660
  12. 1980
  13. 2500
  14. 1000
  15. 4750
  16. 4250
  17. 490
  18. 1560
  19. 210
  20. 800
  21. 350
  22. 700
  23. 1350
  24. 910
  25. 980
  26. 360
  27. 270
  28. 400
  29. 990
  30. 90
  31. 880
  32. 910
  33. 720
  34. 250
  35. 1800
  36. 1710
  37. 350
  38. 1500
  39. 4000
  40. 4000

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