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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 24 · 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. 1.10 × 45 =
  2. 2.35 × 20 =
  3. 3.12 × 35 =
  4. 4.15 × 36 =
  5. 5.15 × 10 =
  6. 6.25 × 8 =
  7. 7.125 × 40 =
  8. 8.25 × 12 =
  9. 9.38 × 65 =
  10. 10.24 × 25 =
  11. 11.45 × 12 =
  12. 12.32 × 55 =
  13. 13.35 × 36 =
  14. 14.24 × 125 =
  15. 15.16 × 55 =
  16. 16.65 × 38 =
  17. 17.55 × 8 =
  18. 18.36 × 45 =
  19. 19.22 × 55 =
  20. 20.34 × 35 =
  21. 21.75 × 16 =
  22. 22.26 × 25 =
  23. 23.16 × 125 =
  24. 24.38 × 25 =
  25. 25.35 × 8 =
  26. 26.34 × 125 =
  27. 27.32 × 15 =
  28. 28.45 × 40 =
  29. 29.65 × 34 =
  30. 30.45 × 12 =
  31. 31.55 × 30 =
  32. 32.34 × 15 =
  33. 33.38 × 15 =
  34. 34.38 × 65 =
  35. 35.15 × 30 =
  36. 36.45 × 14 =
  37. 37.18 × 45 =
  38. 38.75 × 8 =
  39. 39.35 × 16 =
  40. 40.32 × 25 =

Answer key

  1. 450
  2. 700
  3. 420
  4. 540
  5. 150
  6. 200
  7. 5000
  8. 300
  9. 2470
  10. 600
  11. 540
  12. 1760
  13. 1260
  14. 3000
  15. 880
  16. 2470
  17. 440
  18. 1620
  19. 1210
  20. 1190
  21. 1200
  22. 650
  23. 2000
  24. 950
  25. 280
  26. 4250
  27. 480
  28. 1800
  29. 2210
  30. 540
  31. 1650
  32. 510
  33. 570
  34. 2470
  35. 450
  36. 630
  37. 810
  38. 600
  39. 560
  40. 800

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