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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 675 · 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 × 55 =
  2. 2.40 × 125 =
  3. 3.65 × 8 =
  4. 4.45 × 20 =
  5. 5.25 × 20 =
  6. 6.75 × 12 =
  7. 7.18 × 25 =
  8. 8.25 × 20 =
  9. 9.6 × 25 =
  10. 10.75 × 38 =
  11. 11.45 × 10 =
  12. 12.38 × 35 =
  13. 13.25 × 34 =
  14. 14.125 × 14 =
  15. 15.55 × 14 =
  16. 16.45 × 8 =
  17. 17.25 × 32 =
  18. 18.15 × 30 =
  19. 19.25 × 14 =
  20. 20.65 × 40 =
  21. 21.65 × 8 =
  22. 22.12 × 65 =
  23. 23.25 × 32 =
  24. 24.14 × 55 =
  25. 25.65 × 30 =
  26. 26.75 × 16 =
  27. 27.75 × 14 =
  28. 28.38 × 15 =
  29. 29.38 × 15 =
  30. 30.28 × 15 =
  31. 31.25 × 22 =
  32. 32.45 × 20 =
  33. 33.25 × 12 =
  34. 34.125 × 6 =
  35. 35.22 × 45 =
  36. 36.20 × 35 =
  37. 37.25 × 40 =
  38. 38.40 × 25 =
  39. 39.16 × 125 =
  40. 40.15 × 40 =

Answer key

  1. 770
  2. 5000
  3. 520
  4. 900
  5. 500
  6. 900
  7. 450
  8. 500
  9. 150
  10. 2850
  11. 450
  12. 1330
  13. 850
  14. 1750
  15. 770
  16. 360
  17. 800
  18. 450
  19. 350
  20. 2600
  21. 520
  22. 780
  23. 800
  24. 770
  25. 1950
  26. 1200
  27. 1050
  28. 570
  29. 570
  30. 420
  31. 550
  32. 900
  33. 300
  34. 750
  35. 990
  36. 700
  37. 1000
  38. 1000
  39. 2000
  40. 600

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