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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 14 · 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. 1.32 × 55 =
  2. 2.18 × 15 =
  3. 3.8 × 25 =
  4. 4.125 × 30 =
  5. 5.125 × 40 =
  6. 6.12 × 125 =
  7. 7.75 × 8 =
  8. 8.40 × 35 =
  9. 9.24 × 75 =
  10. 10.38 × 125 =
  11. 11.26 × 125 =
  12. 12.15 × 26 =
  13. 13.65 × 8 =
  14. 14.45 × 8 =
  15. 15.30 × 25 =
  16. 16.125 × 12 =
  17. 17.22 × 55 =
  18. 18.45 × 24 =
  19. 19.45 × 22 =
  20. 20.125 × 30 =
  21. 21.10 × 15 =
  22. 22.25 × 34 =
  23. 23.25 × 16 =
  24. 24.18 × 125 =
  25. 25.65 × 32 =
  26. 26.30 × 15 =
  27. 27.28 × 55 =
  28. 28.125 × 12 =
  29. 29.10 × 45 =
  30. 30.65 × 28 =
  31. 31.14 × 15 =
  32. 32.30 × 15 =
  33. 33.38 × 65 =
  34. 34.24 × 15 =
  35. 35.75 × 36 =
  36. 36.125 × 6 =
  37. 37.55 × 28 =
  38. 38.14 × 125 =
  39. 39.45 × 6 =
  40. 40.65 × 40 =

Answer key

  1. 1760
  2. 270
  3. 200
  4. 3750
  5. 5000
  6. 1500
  7. 600
  8. 1400
  9. 1800
  10. 4750
  11. 3250
  12. 390
  13. 520
  14. 360
  15. 750
  16. 1500
  17. 1210
  18. 1080
  19. 990
  20. 3750
  21. 150
  22. 850
  23. 400
  24. 2250
  25. 2080
  26. 450
  27. 1540
  28. 1500
  29. 450
  30. 1820
  31. 210
  32. 450
  33. 2470
  34. 360
  35. 2700
  36. 750
  37. 1540
  38. 1750
  39. 270
  40. 2600

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