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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 667 · 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. 1.30 × 65 =
  2. 2.55 × 36 =
  3. 3.12 × 65 =
  4. 4.36 × 125 =
  5. 5.25 × 34 =
  6. 6.65 × 8 =
  7. 7.34 × 65 =
  8. 8.30 × 35 =
  9. 9.6 × 65 =
  10. 10.25 × 20 =
  11. 11.28 × 25 =
  12. 12.55 × 14 =
  13. 13.65 × 30 =
  14. 14.8 × 15 =
  15. 15.38 × 45 =
  16. 16.65 × 38 =
  17. 17.55 × 22 =
  18. 18.26 × 65 =
  19. 19.65 × 14 =
  20. 20.45 × 16 =
  21. 21.125 × 26 =
  22. 22.75 × 36 =
  23. 23.125 × 32 =
  24. 24.24 × 15 =
  25. 25.32 × 125 =
  26. 26.75 × 30 =
  27. 27.125 × 36 =
  28. 28.22 × 75 =
  29. 29.18 × 65 =
  30. 30.8 × 45 =
  31. 31.6 × 15 =
  32. 32.75 × 36 =
  33. 33.32 × 25 =
  34. 34.55 × 36 =
  35. 35.26 × 35 =
  36. 36.25 × 10 =
  37. 37.125 × 30 =
  38. 38.75 × 6 =
  39. 39.34 × 75 =
  40. 40.125 × 14 =

Answer key

  1. 1950
  2. 1980
  3. 780
  4. 4500
  5. 850
  6. 520
  7. 2210
  8. 1050
  9. 390
  10. 500
  11. 700
  12. 770
  13. 1950
  14. 120
  15. 1710
  16. 2470
  17. 1210
  18. 1690
  19. 910
  20. 720
  21. 3250
  22. 2700
  23. 4000
  24. 360
  25. 4000
  26. 2250
  27. 4500
  28. 1650
  29. 1170
  30. 360
  31. 90
  32. 2700
  33. 800
  34. 1980
  35. 910
  36. 250
  37. 3750
  38. 450
  39. 2550
  40. 1750

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