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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 508 · 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 × 26 =
  2. 2.55 × 10 =
  3. 3.24 × 25 =
  4. 4.35 × 16 =
  5. 5.12 × 45 =
  6. 6.35 × 28 =
  7. 7.45 × 32 =
  8. 8.125 × 22 =
  9. 9.125 × 14 =
  10. 10.26 × 125 =
  11. 11.8 × 35 =
  12. 12.25 × 8 =
  13. 13.35 × 12 =
  14. 14.55 × 28 =
  15. 15.55 × 30 =
  16. 16.25 × 24 =
  17. 17.125 × 34 =
  18. 18.15 × 16 =
  19. 19.32 × 55 =
  20. 20.75 × 12 =
  21. 21.45 × 22 =
  22. 22.75 × 36 =
  23. 23.28 × 35 =
  24. 24.55 × 22 =
  25. 25.15 × 12 =
  26. 26.45 × 24 =
  27. 27.28 × 25 =
  28. 28.25 × 6 =
  29. 29.25 × 30 =
  30. 30.10 × 25 =
  31. 31.25 × 20 =
  32. 32.6 × 55 =
  33. 33.55 × 36 =
  34. 34.40 × 125 =
  35. 35.16 × 35 =
  36. 36.14 × 45 =
  37. 37.18 × 55 =
  38. 38.125 × 34 =
  39. 39.16 × 25 =
  40. 40.45 × 14 =

Answer key

  1. 1690
  2. 550
  3. 600
  4. 560
  5. 540
  6. 980
  7. 1440
  8. 2750
  9. 1750
  10. 3250
  11. 280
  12. 200
  13. 420
  14. 1540
  15. 1650
  16. 600
  17. 4250
  18. 240
  19. 1760
  20. 900
  21. 990
  22. 2700
  23. 980
  24. 1210
  25. 180
  26. 1080
  27. 700
  28. 150
  29. 750
  30. 250
  31. 500
  32. 330
  33. 1980
  34. 5000
  35. 560
  36. 630
  37. 990
  38. 4250
  39. 400
  40. 630

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