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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 580 · 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. 1.14 × 125 =
  2. 2.15 × 24 =
  3. 3.25 × 38 =
  4. 4.12 × 25 =
  5. 5.10 × 65 =
  6. 6.40 × 75 =
  7. 7.35 × 16 =
  8. 8.12 × 125 =
  9. 9.15 × 16 =
  10. 10.8 × 35 =
  11. 11.6 × 25 =
  12. 12.38 × 25 =
  13. 13.35 × 24 =
  14. 14.15 × 38 =
  15. 15.55 × 10 =
  16. 16.40 × 35 =
  17. 17.20 × 55 =
  18. 18.10 × 65 =
  19. 19.75 × 40 =
  20. 20.45 × 40 =
  21. 21.16 × 15 =
  22. 22.35 × 12 =
  23. 23.55 × 12 =
  24. 24.16 × 45 =
  25. 25.35 × 14 =
  26. 26.15 × 12 =
  27. 27.20 × 35 =
  28. 28.35 × 8 =
  29. 29.75 × 38 =
  30. 30.45 × 28 =
  31. 31.125 × 12 =
  32. 32.15 × 18 =
  33. 33.15 × 20 =
  34. 34.75 × 6 =
  35. 35.75 × 36 =
  36. 36.125 × 12 =
  37. 37.30 × 35 =
  38. 38.25 × 8 =
  39. 39.28 × 35 =
  40. 40.125 × 16 =

Answer key

  1. 1750
  2. 360
  3. 950
  4. 300
  5. 650
  6. 3000
  7. 560
  8. 1500
  9. 240
  10. 280
  11. 150
  12. 950
  13. 840
  14. 570
  15. 550
  16. 1400
  17. 1100
  18. 650
  19. 3000
  20. 1800
  21. 240
  22. 420
  23. 660
  24. 720
  25. 490
  26. 180
  27. 700
  28. 280
  29. 2850
  30. 1260
  31. 1500
  32. 270
  33. 300
  34. 450
  35. 2700
  36. 1500
  37. 1050
  38. 200
  39. 980
  40. 2000

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