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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 621 · 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. 1.45 × 20 =
  2. 2.34 × 25 =
  3. 3.32 × 35 =
  4. 4.18 × 125 =
  5. 5.15 × 6 =
  6. 6.38 × 45 =
  7. 7.6 × 15 =
  8. 8.125 × 18 =
  9. 9.36 × 25 =
  10. 10.8 × 15 =
  11. 11.125 × 20 =
  12. 12.40 × 125 =
  13. 13.12 × 125 =
  14. 14.18 × 45 =
  15. 15.35 × 40 =
  16. 16.45 × 30 =
  17. 17.25 × 8 =
  18. 18.24 × 75 =
  19. 19.75 × 24 =
  20. 20.28 × 35 =
  21. 21.6 × 65 =
  22. 22.36 × 45 =
  23. 23.35 × 34 =
  24. 24.12 × 125 =
  25. 25.125 × 24 =
  26. 26.15 × 8 =
  27. 27.40 × 125 =
  28. 28.75 × 12 =
  29. 29.26 × 45 =
  30. 30.45 × 8 =
  31. 31.45 × 20 =
  32. 32.55 × 10 =
  33. 33.15 × 10 =
  34. 34.26 × 15 =
  35. 35.18 × 65 =
  36. 36.125 × 24 =
  37. 37.34 × 65 =
  38. 38.35 × 18 =
  39. 39.75 × 32 =
  40. 40.55 × 30 =

Answer key

  1. 900
  2. 850
  3. 1120
  4. 2250
  5. 90
  6. 1710
  7. 90
  8. 2250
  9. 900
  10. 120
  11. 2500
  12. 5000
  13. 1500
  14. 810
  15. 1400
  16. 1350
  17. 200
  18. 1800
  19. 1800
  20. 980
  21. 390
  22. 1620
  23. 1190
  24. 1500
  25. 3000
  26. 120
  27. 5000
  28. 900
  29. 1170
  30. 360
  31. 900
  32. 550
  33. 150
  34. 390
  35. 1170
  36. 3000
  37. 2210
  38. 630
  39. 2400
  40. 1650

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