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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 253 · 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. 1.20 × 15 =
  2. 2.25 × 8 =
  3. 3.32 × 55 =
  4. 4.10 × 45 =
  5. 5.16 × 15 =
  6. 6.55 × 10 =
  7. 7.15 × 32 =
  8. 8.26 × 45 =
  9. 9.15 × 38 =
  10. 10.22 × 15 =
  11. 11.125 × 8 =
  12. 12.65 × 24 =
  13. 13.75 × 38 =
  14. 14.12 × 65 =
  15. 15.65 × 24 =
  16. 16.25 × 6 =
  17. 17.65 × 18 =
  18. 18.32 × 55 =
  19. 19.15 × 32 =
  20. 20.75 × 20 =
  21. 21.15 × 16 =
  22. 22.8 × 25 =
  23. 23.55 × 36 =
  24. 24.10 × 35 =
  25. 25.55 × 14 =
  26. 26.55 × 38 =
  27. 27.32 × 45 =
  28. 28.10 × 55 =
  29. 29.40 × 65 =
  30. 30.38 × 15 =
  31. 31.55 × 14 =
  32. 32.26 × 75 =
  33. 33.45 × 40 =
  34. 34.20 × 45 =
  35. 35.25 × 8 =
  36. 36.25 × 12 =
  37. 37.25 × 36 =
  38. 38.28 × 25 =
  39. 39.26 × 25 =
  40. 40.14 × 45 =

Answer key

  1. 300
  2. 200
  3. 1760
  4. 450
  5. 240
  6. 550
  7. 480
  8. 1170
  9. 570
  10. 330
  11. 1000
  12. 1560
  13. 2850
  14. 780
  15. 1560
  16. 150
  17. 1170
  18. 1760
  19. 480
  20. 1500
  21. 240
  22. 200
  23. 1980
  24. 350
  25. 770
  26. 2090
  27. 1440
  28. 550
  29. 2600
  30. 570
  31. 770
  32. 1950
  33. 1800
  34. 900
  35. 200
  36. 300
  37. 900
  38. 700
  39. 650
  40. 630

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