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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 506 · 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. 1.65 × 32 =
  2. 2.35 × 8 =
  3. 3.8 × 45 =
  4. 4.8 × 25 =
  5. 5.25 × 26 =
  6. 6.6 × 55 =
  7. 7.65 × 20 =
  8. 8.38 × 65 =
  9. 9.22 × 15 =
  10. 10.10 × 25 =
  11. 11.18 × 25 =
  12. 12.45 × 14 =
  13. 13.65 × 12 =
  14. 14.24 × 75 =
  15. 15.25 × 28 =
  16. 16.75 × 34 =
  17. 17.36 × 125 =
  18. 18.55 × 10 =
  19. 19.75 × 10 =
  20. 20.35 × 12 =
  21. 21.20 × 15 =
  22. 22.15 × 10 =
  23. 23.75 × 26 =
  24. 24.18 × 55 =
  25. 25.25 × 18 =
  26. 26.25 × 26 =
  27. 27.12 × 55 =
  28. 28.55 × 12 =
  29. 29.20 × 15 =
  30. 30.15 × 10 =
  31. 31.28 × 125 =
  32. 32.25 × 8 =
  33. 33.65 × 8 =
  34. 34.38 × 75 =
  35. 35.32 × 55 =
  36. 36.15 × 20 =
  37. 37.35 × 20 =
  38. 38.35 × 18 =
  39. 39.15 × 24 =
  40. 40.20 × 45 =

Answer key

  1. 2080
  2. 280
  3. 360
  4. 200
  5. 650
  6. 330
  7. 1300
  8. 2470
  9. 330
  10. 250
  11. 450
  12. 630
  13. 780
  14. 1800
  15. 700
  16. 2550
  17. 4500
  18. 550
  19. 750
  20. 420
  21. 300
  22. 150
  23. 1950
  24. 990
  25. 450
  26. 650
  27. 660
  28. 660
  29. 300
  30. 150
  31. 3500
  32. 200
  33. 520
  34. 2850
  35. 1760
  36. 300
  37. 700
  38. 630
  39. 360
  40. 900

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