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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 593 · 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. 1.24 × 75 =
  2. 2.18 × 25 =
  3. 3.36 × 25 =
  4. 4.75 × 16 =
  5. 5.22 × 125 =
  6. 6.35 × 14 =
  7. 7.15 × 40 =
  8. 8.65 × 18 =
  9. 9.22 × 15 =
  10. 10.125 × 40 =
  11. 11.40 × 15 =
  12. 12.15 × 6 =
  13. 13.75 × 14 =
  14. 14.8 × 65 =
  15. 15.55 × 36 =
  16. 16.40 × 15 =
  17. 17.40 × 75 =
  18. 18.16 × 45 =
  19. 19.22 × 45 =
  20. 20.6 × 45 =
  21. 21.16 × 75 =
  22. 22.125 × 14 =
  23. 23.35 × 20 =
  24. 24.6 × 15 =
  25. 25.14 × 75 =
  26. 26.32 × 55 =
  27. 27.25 × 26 =
  28. 28.12 × 125 =
  29. 29.25 × 24 =
  30. 30.35 × 10 =
  31. 31.30 × 45 =
  32. 32.15 × 40 =
  33. 33.8 × 15 =
  34. 34.15 × 40 =
  35. 35.45 × 12 =
  36. 36.75 × 12 =
  37. 37.32 × 15 =
  38. 38.125 × 18 =
  39. 39.20 × 35 =
  40. 40.55 × 10 =

Answer key

  1. 1800
  2. 450
  3. 900
  4. 1200
  5. 2750
  6. 490
  7. 600
  8. 1170
  9. 330
  10. 5000
  11. 600
  12. 90
  13. 1050
  14. 520
  15. 1980
  16. 600
  17. 3000
  18. 720
  19. 990
  20. 270
  21. 1200
  22. 1750
  23. 700
  24. 90
  25. 1050
  26. 1760
  27. 650
  28. 1500
  29. 600
  30. 350
  31. 1350
  32. 600
  33. 120
  34. 600
  35. 540
  36. 900
  37. 480
  38. 2250
  39. 700
  40. 550

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