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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 505 · 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. 1.35 × 32 =
  2. 2.55 × 14 =
  3. 3.125 × 28 =
  4. 4.55 × 20 =
  5. 5.32 × 25 =
  6. 6.75 × 36 =
  7. 7.34 × 25 =
  8. 8.45 × 36 =
  9. 9.75 × 36 =
  10. 10.18 × 35 =
  11. 11.125 × 28 =
  12. 12.24 × 75 =
  13. 13.45 × 16 =
  14. 14.75 × 24 =
  15. 15.125 × 40 =
  16. 16.25 × 8 =
  17. 17.75 × 10 =
  18. 18.40 × 35 =
  19. 19.35 × 20 =
  20. 20.10 × 45 =
  21. 21.20 × 65 =
  22. 22.16 × 35 =
  23. 23.34 × 15 =
  24. 24.35 × 22 =
  25. 25.45 × 10 =
  26. 26.65 × 26 =
  27. 27.75 × 12 =
  28. 28.55 × 8 =
  29. 29.75 × 8 =
  30. 30.12 × 65 =
  31. 31.35 × 36 =
  32. 32.10 × 25 =
  33. 33.8 × 35 =
  34. 34.22 × 65 =
  35. 35.16 × 125 =
  36. 36.36 × 125 =
  37. 37.22 × 35 =
  38. 38.55 × 28 =
  39. 39.16 × 15 =
  40. 40.20 × 25 =

Answer key

  1. 1120
  2. 770
  3. 3500
  4. 1100
  5. 800
  6. 2700
  7. 850
  8. 1620
  9. 2700
  10. 630
  11. 3500
  12. 1800
  13. 720
  14. 1800
  15. 5000
  16. 200
  17. 750
  18. 1400
  19. 700
  20. 450
  21. 1300
  22. 560
  23. 510
  24. 770
  25. 450
  26. 1690
  27. 900
  28. 440
  29. 600
  30. 780
  31. 1260
  32. 250
  33. 280
  34. 1430
  35. 2000
  36. 4500
  37. 770
  38. 1540
  39. 240
  40. 500

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