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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 631 · 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. 1.24 × 45 =
  2. 2.20 × 25 =
  3. 3.55 × 36 =
  4. 4.18 × 55 =
  5. 5.25 × 26 =
  6. 6.40 × 125 =
  7. 7.24 × 35 =
  8. 8.30 × 65 =
  9. 9.15 × 28 =
  10. 10.26 × 35 =
  11. 11.24 × 15 =
  12. 12.15 × 12 =
  13. 13.22 × 75 =
  14. 14.30 × 75 =
  15. 15.75 × 20 =
  16. 16.15 × 24 =
  17. 17.12 × 55 =
  18. 18.10 × 25 =
  19. 19.45 × 24 =
  20. 20.125 × 28 =
  21. 21.35 × 10 =
  22. 22.35 × 14 =
  23. 23.8 × 25 =
  24. 24.18 × 55 =
  25. 25.35 × 12 =
  26. 26.45 × 6 =
  27. 27.15 × 8 =
  28. 28.20 × 15 =
  29. 29.36 × 45 =
  30. 30.75 × 10 =
  31. 31.20 × 45 =
  32. 32.30 × 35 =
  33. 33.28 × 75 =
  34. 34.25 × 8 =
  35. 35.38 × 55 =
  36. 36.22 × 15 =
  37. 37.45 × 38 =
  38. 38.35 × 32 =
  39. 39.35 × 38 =
  40. 40.25 × 30 =

Answer key

  1. 1080
  2. 500
  3. 1980
  4. 990
  5. 650
  6. 5000
  7. 840
  8. 1950
  9. 420
  10. 910
  11. 360
  12. 180
  13. 1650
  14. 2250
  15. 1500
  16. 360
  17. 660
  18. 250
  19. 1080
  20. 3500
  21. 350
  22. 490
  23. 200
  24. 990
  25. 420
  26. 270
  27. 120
  28. 300
  29. 1620
  30. 750
  31. 900
  32. 1050
  33. 2100
  34. 200
  35. 2090
  36. 330
  37. 1710
  38. 1120
  39. 1330
  40. 750

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