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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 749 · 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 × 20 =
  2. 2.45 × 10 =
  3. 3.65 × 22 =
  4. 4.15 × 20 =
  5. 5.30 × 125 =
  6. 6.12 × 25 =
  7. 7.6 × 55 =
  8. 8.125 × 12 =
  9. 9.15 × 6 =
  10. 10.65 × 36 =
  11. 11.32 × 45 =
  12. 12.65 × 8 =
  13. 13.18 × 25 =
  14. 14.15 × 34 =
  15. 15.15 × 12 =
  16. 16.15 × 6 =
  17. 17.12 × 25 =
  18. 18.125 × 30 =
  19. 19.30 × 15 =
  20. 20.35 × 30 =
  21. 21.15 × 10 =
  22. 22.45 × 10 =
  23. 23.45 × 8 =
  24. 24.35 × 24 =
  25. 25.32 × 55 =
  26. 26.55 × 34 =
  27. 27.12 × 35 =
  28. 28.35 × 32 =
  29. 29.55 × 24 =
  30. 30.55 × 24 =
  31. 31.35 × 12 =
  32. 32.25 × 18 =
  33. 33.10 × 75 =
  34. 34.15 × 8 =
  35. 35.75 × 8 =
  36. 36.38 × 45 =
  37. 37.6 × 75 =
  38. 38.75 × 26 =
  39. 39.25 × 20 =
  40. 40.75 × 10 =

Answer key

  1. 500
  2. 450
  3. 1430
  4. 300
  5. 3750
  6. 300
  7. 330
  8. 1500
  9. 90
  10. 2340
  11. 1440
  12. 520
  13. 450
  14. 510
  15. 180
  16. 90
  17. 300
  18. 3750
  19. 450
  20. 1050
  21. 150
  22. 450
  23. 360
  24. 840
  25. 1760
  26. 1870
  27. 420
  28. 1120
  29. 1320
  30. 1320
  31. 420
  32. 450
  33. 750
  34. 120
  35. 600
  36. 1710
  37. 450
  38. 1950
  39. 500
  40. 750

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