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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 579 · 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. 1.34 × 125 =
  2. 2.18 × 35 =
  3. 3.75 × 38 =
  4. 4.65 × 10 =
  5. 5.10 × 125 =
  6. 6.36 × 35 =
  7. 7.35 × 32 =
  8. 8.26 × 25 =
  9. 9.45 × 38 =
  10. 10.15 × 26 =
  11. 11.125 × 40 =
  12. 12.8 × 25 =
  13. 13.15 × 24 =
  14. 14.45 × 20 =
  15. 15.38 × 65 =
  16. 16.25 × 20 =
  17. 17.45 × 24 =
  18. 18.55 × 36 =
  19. 19.22 × 55 =
  20. 20.75 × 40 =
  21. 21.12 × 15 =
  22. 22.25 × 12 =
  23. 23.35 × 28 =
  24. 24.25 × 20 =
  25. 25.22 × 75 =
  26. 26.25 × 28 =
  27. 27.25 × 36 =
  28. 28.8 × 45 =
  29. 29.24 × 45 =
  30. 30.6 × 25 =
  31. 31.30 × 55 =
  32. 32.55 × 14 =
  33. 33.55 × 10 =
  34. 34.55 × 8 =
  35. 35.75 × 14 =
  36. 36.14 × 35 =
  37. 37.28 × 25 =
  38. 38.26 × 65 =
  39. 39.15 × 32 =
  40. 40.14 × 125 =

Answer key

  1. 4250
  2. 630
  3. 2850
  4. 650
  5. 1250
  6. 1260
  7. 1120
  8. 650
  9. 1710
  10. 390
  11. 5000
  12. 200
  13. 360
  14. 900
  15. 2470
  16. 500
  17. 1080
  18. 1980
  19. 1210
  20. 3000
  21. 180
  22. 300
  23. 980
  24. 500
  25. 1650
  26. 700
  27. 900
  28. 360
  29. 1080
  30. 150
  31. 1650
  32. 770
  33. 550
  34. 440
  35. 1050
  36. 490
  37. 700
  38. 1690
  39. 480
  40. 1750

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