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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 824 · 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. 1.14 × 55 =
  2. 2.18 × 25 =
  3. 3.35 × 34 =
  4. 4.14 × 125 =
  5. 5.35 × 10 =
  6. 6.65 × 12 =
  7. 7.45 × 32 =
  8. 8.36 × 45 =
  9. 9.75 × 36 =
  10. 10.55 × 38 =
  11. 11.6 × 15 =
  12. 12.14 × 35 =
  13. 13.40 × 15 =
  14. 14.45 × 18 =
  15. 15.125 × 24 =
  16. 16.26 × 35 =
  17. 17.34 × 25 =
  18. 18.65 × 38 =
  19. 19.15 × 38 =
  20. 20.40 × 45 =
  21. 21.25 × 36 =
  22. 22.65 × 10 =
  23. 23.32 × 125 =
  24. 24.55 × 36 =
  25. 25.20 × 15 =
  26. 26.34 × 125 =
  27. 27.34 × 55 =
  28. 28.22 × 15 =
  29. 29.38 × 125 =
  30. 30.12 × 125 =
  31. 31.10 × 55 =
  32. 32.35 × 22 =
  33. 33.14 × 35 =
  34. 34.75 × 30 =
  35. 35.45 × 30 =
  36. 36.38 × 35 =
  37. 37.125 × 14 =
  38. 38.34 × 15 =
  39. 39.24 × 25 =
  40. 40.35 × 12 =

Answer key

  1. 770
  2. 450
  3. 1190
  4. 1750
  5. 350
  6. 780
  7. 1440
  8. 1620
  9. 2700
  10. 2090
  11. 90
  12. 490
  13. 600
  14. 810
  15. 3000
  16. 910
  17. 850
  18. 2470
  19. 570
  20. 1800
  21. 900
  22. 650
  23. 4000
  24. 1980
  25. 300
  26. 4250
  27. 1870
  28. 330
  29. 4750
  30. 1500
  31. 550
  32. 770
  33. 490
  34. 2250
  35. 1350
  36. 1330
  37. 1750
  38. 510
  39. 600
  40. 420

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