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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 404 · 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. 1.25 × 22 =
  2. 2.34 × 45 =
  3. 3.28 × 15 =
  4. 4.125 × 40 =
  5. 5.25 × 14 =
  6. 6.15 × 10 =
  7. 7.12 × 125 =
  8. 8.15 × 10 =
  9. 9.12 × 25 =
  10. 10.36 × 35 =
  11. 11.30 × 45 =
  12. 12.35 × 10 =
  13. 13.75 × 14 =
  14. 14.65 × 8 =
  15. 15.40 × 45 =
  16. 16.35 × 8 =
  17. 17.75 × 6 =
  18. 18.6 × 65 =
  19. 19.45 × 30 =
  20. 20.8 × 75 =
  21. 21.8 × 55 =
  22. 22.55 × 30 =
  23. 23.28 × 125 =
  24. 24.32 × 45 =
  25. 25.34 × 25 =
  26. 26.25 × 6 =
  27. 27.36 × 15 =
  28. 28.8 × 35 =
  29. 29.15 × 16 =
  30. 30.8 × 35 =
  31. 31.24 × 75 =
  32. 32.75 × 32 =
  33. 33.24 × 45 =
  34. 34.55 × 14 =
  35. 35.65 × 34 =
  36. 36.18 × 55 =
  37. 37.55 × 28 =
  38. 38.75 × 8 =
  39. 39.16 × 35 =
  40. 40.25 × 30 =

Answer key

  1. 550
  2. 1530
  3. 420
  4. 5000
  5. 350
  6. 150
  7. 1500
  8. 150
  9. 300
  10. 1260
  11. 1350
  12. 350
  13. 1050
  14. 520
  15. 1800
  16. 280
  17. 450
  18. 390
  19. 1350
  20. 600
  21. 440
  22. 1650
  23. 3500
  24. 1440
  25. 850
  26. 150
  27. 540
  28. 280
  29. 240
  30. 280
  31. 1800
  32. 2400
  33. 1080
  34. 770
  35. 2210
  36. 990
  37. 1540
  38. 600
  39. 560
  40. 750

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