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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 737 · 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. 1.15 × 30 =
  2. 2.20 × 15 =
  3. 3.16 × 75 =
  4. 4.65 × 14 =
  5. 5.55 × 32 =
  6. 6.12 × 35 =
  7. 7.75 × 18 =
  8. 8.25 × 36 =
  9. 9.12 × 15 =
  10. 10.14 × 15 =
  11. 11.20 × 15 =
  12. 12.25 × 38 =
  13. 13.10 × 15 =
  14. 14.15 × 12 =
  15. 15.15 × 38 =
  16. 16.55 × 26 =
  17. 17.55 × 36 =
  18. 18.26 × 25 =
  19. 19.36 × 45 =
  20. 20.25 × 14 =
  21. 21.36 × 75 =
  22. 22.22 × 35 =
  23. 23.22 × 15 =
  24. 24.65 × 40 =
  25. 25.8 × 25 =
  26. 26.45 × 14 =
  27. 27.34 × 25 =
  28. 28.6 × 125 =
  29. 29.38 × 25 =
  30. 30.6 × 75 =
  31. 31.125 × 10 =
  32. 32.35 × 30 =
  33. 33.25 × 16 =
  34. 34.125 × 10 =
  35. 35.75 × 18 =
  36. 36.75 × 8 =
  37. 37.35 × 12 =
  38. 38.36 × 75 =
  39. 39.26 × 75 =
  40. 40.22 × 125 =

Answer key

  1. 450
  2. 300
  3. 1200
  4. 910
  5. 1760
  6. 420
  7. 1350
  8. 900
  9. 180
  10. 210
  11. 300
  12. 950
  13. 150
  14. 180
  15. 570
  16. 1430
  17. 1980
  18. 650
  19. 1620
  20. 350
  21. 2700
  22. 770
  23. 330
  24. 2600
  25. 200
  26. 630
  27. 850
  28. 750
  29. 950
  30. 450
  31. 1250
  32. 1050
  33. 400
  34. 1250
  35. 1350
  36. 600
  37. 420
  38. 2700
  39. 1950
  40. 2750

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