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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 558 · 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. 1.16 × 45 =
  2. 2.20 × 55 =
  3. 3.32 × 25 =
  4. 4.34 × 25 =
  5. 5.10 × 45 =
  6. 6.15 × 12 =
  7. 7.14 × 75 =
  8. 8.25 × 10 =
  9. 9.65 × 30 =
  10. 10.125 × 14 =
  11. 11.35 × 6 =
  12. 12.18 × 65 =
  13. 13.36 × 25 =
  14. 14.38 × 35 =
  15. 15.12 × 25 =
  16. 16.45 × 30 =
  17. 17.36 × 35 =
  18. 18.55 × 20 =
  19. 19.16 × 45 =
  20. 20.20 × 125 =
  21. 21.8 × 55 =
  22. 22.125 × 10 =
  23. 23.16 × 125 =
  24. 24.75 × 22 =
  25. 25.25 × 20 =
  26. 26.65 × 30 =
  27. 27.75 × 8 =
  28. 28.25 × 10 =
  29. 29.25 × 6 =
  30. 30.22 × 125 =
  31. 31.25 × 18 =
  32. 32.125 × 14 =
  33. 33.125 × 20 =
  34. 34.65 × 30 =
  35. 35.38 × 45 =
  36. 36.25 × 14 =
  37. 37.55 × 40 =
  38. 38.40 × 15 =
  39. 39.20 × 15 =
  40. 40.15 × 24 =

Answer key

  1. 720
  2. 1100
  3. 800
  4. 850
  5. 450
  6. 180
  7. 1050
  8. 250
  9. 1950
  10. 1750
  11. 210
  12. 1170
  13. 900
  14. 1330
  15. 300
  16. 1350
  17. 1260
  18. 1100
  19. 720
  20. 2500
  21. 440
  22. 1250
  23. 2000
  24. 1650
  25. 500
  26. 1950
  27. 600
  28. 250
  29. 150
  30. 2750
  31. 450
  32. 1750
  33. 2500
  34. 1950
  35. 1710
  36. 350
  37. 2200
  38. 600
  39. 300
  40. 360

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