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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 372 · 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. 1.8 × 125 =
  2. 2.15 × 38 =
  3. 3.35 × 8 =
  4. 4.35 × 10 =
  5. 5.35 × 8 =
  6. 6.40 × 15 =
  7. 7.32 × 65 =
  8. 8.65 × 6 =
  9. 9.35 × 22 =
  10. 10.25 × 8 =
  11. 11.25 × 10 =
  12. 12.25 × 38 =
  13. 13.12 × 125 =
  14. 14.55 × 20 =
  15. 15.32 × 65 =
  16. 16.22 × 125 =
  17. 17.15 × 36 =
  18. 18.45 × 16 =
  19. 19.125 × 14 =
  20. 20.75 × 20 =
  21. 21.16 × 45 =
  22. 22.25 × 14 =
  23. 23.32 × 65 =
  24. 24.32 × 15 =
  25. 25.35 × 20 =
  26. 26.38 × 15 =
  27. 27.32 × 125 =
  28. 28.8 × 125 =
  29. 29.125 × 8 =
  30. 30.35 × 34 =
  31. 31.55 × 14 =
  32. 32.40 × 125 =
  33. 33.25 × 16 =
  34. 34.12 × 25 =
  35. 35.35 × 32 =
  36. 36.75 × 26 =
  37. 37.65 × 6 =
  38. 38.35 × 28 =
  39. 39.15 × 30 =
  40. 40.28 × 55 =

Answer key

  1. 1000
  2. 570
  3. 280
  4. 350
  5. 280
  6. 600
  7. 2080
  8. 390
  9. 770
  10. 200
  11. 250
  12. 950
  13. 1500
  14. 1100
  15. 2080
  16. 2750
  17. 540
  18. 720
  19. 1750
  20. 1500
  21. 720
  22. 350
  23. 2080
  24. 480
  25. 700
  26. 570
  27. 4000
  28. 1000
  29. 1000
  30. 1190
  31. 770
  32. 5000
  33. 400
  34. 300
  35. 1120
  36. 1950
  37. 390
  38. 980
  39. 450
  40. 1540

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