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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 321 · 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. 1.55 × 12 =
  2. 2.25 × 28 =
  3. 3.55 × 34 =
  4. 4.75 × 26 =
  5. 5.25 × 12 =
  6. 6.125 × 6 =
  7. 7.25 × 18 =
  8. 8.75 × 12 =
  9. 9.12 × 25 =
  10. 10.45 × 14 =
  11. 11.125 × 36 =
  12. 12.18 × 45 =
  13. 13.15 × 36 =
  14. 14.35 × 18 =
  15. 15.55 × 16 =
  16. 16.14 × 25 =
  17. 17.125 × 26 =
  18. 18.35 × 28 =
  19. 19.25 × 28 =
  20. 20.8 × 65 =
  21. 21.40 × 55 =
  22. 22.25 × 6 =
  23. 23.75 × 36 =
  24. 24.22 × 75 =
  25. 25.15 × 10 =
  26. 26.15 × 6 =
  27. 27.15 × 40 =
  28. 28.55 × 26 =
  29. 29.25 × 14 =
  30. 30.40 × 75 =
  31. 31.65 × 32 =
  32. 32.25 × 10 =
  33. 33.55 × 34 =
  34. 34.125 × 26 =
  35. 35.65 × 14 =
  36. 36.55 × 22 =
  37. 37.15 × 28 =
  38. 38.45 × 16 =
  39. 39.25 × 32 =
  40. 40.8 × 25 =

Answer key

  1. 660
  2. 700
  3. 1870
  4. 1950
  5. 300
  6. 750
  7. 450
  8. 900
  9. 300
  10. 630
  11. 4500
  12. 810
  13. 540
  14. 630
  15. 880
  16. 350
  17. 3250
  18. 980
  19. 700
  20. 520
  21. 2200
  22. 150
  23. 2700
  24. 1650
  25. 150
  26. 90
  27. 600
  28. 1430
  29. 350
  30. 3000
  31. 2080
  32. 250
  33. 1870
  34. 3250
  35. 910
  36. 1210
  37. 420
  38. 720
  39. 800
  40. 200

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