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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 423 · 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. 1.15 × 28 =
  2. 2.45 × 6 =
  3. 3.125 × 40 =
  4. 4.45 × 16 =
  5. 5.125 × 14 =
  6. 6.15 × 16 =
  7. 7.10 × 35 =
  8. 8.35 × 28 =
  9. 9.28 × 35 =
  10. 10.12 × 45 =
  11. 11.65 × 32 =
  12. 12.24 × 45 =
  13. 13.15 × 26 =
  14. 14.10 × 55 =
  15. 15.40 × 75 =
  16. 16.38 × 25 =
  17. 17.30 × 45 =
  18. 18.15 × 16 =
  19. 19.25 × 34 =
  20. 20.6 × 75 =
  21. 21.25 × 14 =
  22. 22.30 × 65 =
  23. 23.15 × 32 =
  24. 24.6 × 35 =
  25. 25.20 × 65 =
  26. 26.38 × 45 =
  27. 27.40 × 45 =
  28. 28.32 × 55 =
  29. 29.65 × 8 =
  30. 30.26 × 25 =
  31. 31.24 × 25 =
  32. 32.45 × 24 =
  33. 33.10 × 75 =
  34. 34.25 × 8 =
  35. 35.55 × 6 =
  36. 36.20 × 25 =
  37. 37.35 × 22 =
  38. 38.8 × 55 =
  39. 39.65 × 24 =
  40. 40.65 × 36 =

Answer key

  1. 420
  2. 270
  3. 5000
  4. 720
  5. 1750
  6. 240
  7. 350
  8. 980
  9. 980
  10. 540
  11. 2080
  12. 1080
  13. 390
  14. 550
  15. 3000
  16. 950
  17. 1350
  18. 240
  19. 850
  20. 450
  21. 350
  22. 1950
  23. 480
  24. 210
  25. 1300
  26. 1710
  27. 1800
  28. 1760
  29. 520
  30. 650
  31. 600
  32. 1080
  33. 750
  34. 200
  35. 330
  36. 500
  37. 770
  38. 440
  39. 1560
  40. 2340

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