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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 289 · 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. 1.12 × 35 =
  2. 2.35 × 30 =
  3. 3.125 × 34 =
  4. 4.75 × 6 =
  5. 5.14 × 75 =
  6. 6.12 × 25 =
  7. 7.32 × 25 =
  8. 8.75 × 34 =
  9. 9.75 × 22 =
  10. 10.35 × 10 =
  11. 11.65 × 30 =
  12. 12.55 × 8 =
  13. 13.22 × 15 =
  14. 14.25 × 12 =
  15. 15.65 × 10 =
  16. 16.75 × 6 =
  17. 17.38 × 25 =
  18. 18.25 × 24 =
  19. 19.40 × 35 =
  20. 20.8 × 25 =
  21. 21.20 × 65 =
  22. 22.22 × 75 =
  23. 23.8 × 35 =
  24. 24.38 × 45 =
  25. 25.14 × 55 =
  26. 26.36 × 15 =
  27. 27.26 × 75 =
  28. 28.25 × 10 =
  29. 29.36 × 45 =
  30. 30.55 × 14 =
  31. 31.125 × 22 =
  32. 32.75 × 12 =
  33. 33.75 × 40 =
  34. 34.20 × 25 =
  35. 35.75 × 22 =
  36. 36.32 × 25 =
  37. 37.20 × 65 =
  38. 38.24 × 45 =
  39. 39.14 × 15 =
  40. 40.125 × 14 =

Answer key

  1. 420
  2. 1050
  3. 4250
  4. 450
  5. 1050
  6. 300
  7. 800
  8. 2550
  9. 1650
  10. 350
  11. 1950
  12. 440
  13. 330
  14. 300
  15. 650
  16. 450
  17. 950
  18. 600
  19. 1400
  20. 200
  21. 1300
  22. 1650
  23. 280
  24. 1710
  25. 770
  26. 540
  27. 1950
  28. 250
  29. 1620
  30. 770
  31. 2750
  32. 900
  33. 3000
  34. 500
  35. 1650
  36. 800
  37. 1300
  38. 1080
  39. 210
  40. 1750

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