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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 645 · 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 × 35 =
  2. 2.125 × 12 =
  3. 3.125 × 40 =
  4. 4.55 × 8 =
  5. 5.20 × 45 =
  6. 6.15 × 40 =
  7. 7.35 × 18 =
  8. 8.36 × 25 =
  9. 9.6 × 25 =
  10. 10.15 × 14 =
  11. 11.75 × 14 =
  12. 12.12 × 25 =
  13. 13.40 × 25 =
  14. 14.34 × 65 =
  15. 15.12 × 25 =
  16. 16.55 × 40 =
  17. 17.6 × 75 =
  18. 18.15 × 10 =
  19. 19.15 × 34 =
  20. 20.25 × 6 =
  21. 21.55 × 36 =
  22. 22.35 × 20 =
  23. 23.45 × 12 =
  24. 24.24 × 125 =
  25. 25.55 × 34 =
  26. 26.75 × 40 =
  27. 27.25 × 10 =
  28. 28.35 × 6 =
  29. 29.26 × 65 =
  30. 30.45 × 22 =
  31. 31.20 × 25 =
  32. 32.18 × 15 =
  33. 33.15 × 32 =
  34. 34.125 × 14 =
  35. 35.8 × 15 =
  36. 36.35 × 28 =
  37. 37.26 × 75 =
  38. 38.18 × 35 =
  39. 39.25 × 6 =
  40. 40.55 × 14 =

Answer key

  1. 1120
  2. 1500
  3. 5000
  4. 440
  5. 900
  6. 600
  7. 630
  8. 900
  9. 150
  10. 210
  11. 1050
  12. 300
  13. 1000
  14. 2210
  15. 300
  16. 2200
  17. 450
  18. 150
  19. 510
  20. 150
  21. 1980
  22. 700
  23. 540
  24. 3000
  25. 1870
  26. 3000
  27. 250
  28. 210
  29. 1690
  30. 990
  31. 500
  32. 270
  33. 480
  34. 1750
  35. 120
  36. 980
  37. 1950
  38. 630
  39. 150
  40. 770

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