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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 587 · 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. 1.16 × 125 =
  2. 2.45 × 8 =
  3. 3.25 × 14 =
  4. 4.16 × 25 =
  5. 5.32 × 75 =
  6. 6.15 × 28 =
  7. 7.25 × 16 =
  8. 8.35 × 40 =
  9. 9.10 × 15 =
  10. 10.36 × 15 =
  11. 11.35 × 20 =
  12. 12.25 × 20 =
  13. 13.16 × 25 =
  14. 14.55 × 40 =
  15. 15.20 × 35 =
  16. 16.55 × 24 =
  17. 17.40 × 65 =
  18. 18.24 × 65 =
  19. 19.125 × 32 =
  20. 20.45 × 38 =
  21. 21.20 × 35 =
  22. 22.25 × 32 =
  23. 23.65 × 28 =
  24. 24.16 × 15 =
  25. 25.25 × 6 =
  26. 26.28 × 125 =
  27. 27.65 × 30 =
  28. 28.45 × 32 =
  29. 29.25 × 16 =
  30. 30.38 × 55 =
  31. 31.12 × 45 =
  32. 32.55 × 8 =
  33. 33.25 × 36 =
  34. 34.75 × 22 =
  35. 35.24 × 25 =
  36. 36.125 × 24 =
  37. 37.25 × 10 =
  38. 38.15 × 14 =
  39. 39.125 × 30 =
  40. 40.35 × 24 =

Answer key

  1. 2000
  2. 360
  3. 350
  4. 400
  5. 2400
  6. 420
  7. 400
  8. 1400
  9. 150
  10. 540
  11. 700
  12. 500
  13. 400
  14. 2200
  15. 700
  16. 1320
  17. 2600
  18. 1560
  19. 4000
  20. 1710
  21. 700
  22. 800
  23. 1820
  24. 240
  25. 150
  26. 3500
  27. 1950
  28. 1440
  29. 400
  30. 2090
  31. 540
  32. 440
  33. 900
  34. 1650
  35. 600
  36. 3000
  37. 250
  38. 210
  39. 3750
  40. 840

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