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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 52 · 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. 1.6 × 75 =
  2. 2.55 × 16 =
  3. 3.75 × 14 =
  4. 4.65 × 28 =
  5. 5.125 × 6 =
  6. 6.6 × 35 =
  7. 7.55 × 10 =
  8. 8.36 × 15 =
  9. 9.28 × 55 =
  10. 10.35 × 30 =
  11. 11.75 × 32 =
  12. 12.22 × 25 =
  13. 13.75 × 8 =
  14. 14.75 × 38 =
  15. 15.36 × 75 =
  16. 16.75 × 14 =
  17. 17.6 × 25 =
  18. 18.65 × 26 =
  19. 19.8 × 35 =
  20. 20.75 × 20 =
  21. 21.15 × 40 =
  22. 22.35 × 22 =
  23. 23.65 × 26 =
  24. 24.75 × 26 =
  25. 25.28 × 75 =
  26. 26.65 × 14 =
  27. 27.55 × 28 =
  28. 28.36 × 45 =
  29. 29.12 × 75 =
  30. 30.8 × 65 =
  31. 31.35 × 40 =
  32. 32.38 × 25 =
  33. 33.65 × 10 =
  34. 34.65 × 38 =
  35. 35.25 × 22 =
  36. 36.45 × 34 =
  37. 37.22 × 75 =
  38. 38.16 × 15 =
  39. 39.75 × 24 =
  40. 40.25 × 14 =

Answer key

  1. 450
  2. 880
  3. 1050
  4. 1820
  5. 750
  6. 210
  7. 550
  8. 540
  9. 1540
  10. 1050
  11. 2400
  12. 550
  13. 600
  14. 2850
  15. 2700
  16. 1050
  17. 150
  18. 1690
  19. 280
  20. 1500
  21. 600
  22. 770
  23. 1690
  24. 1950
  25. 2100
  26. 910
  27. 1540
  28. 1620
  29. 900
  30. 520
  31. 1400
  32. 950
  33. 650
  34. 2470
  35. 550
  36. 1530
  37. 1650
  38. 240
  39. 1800
  40. 350

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