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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 95 · 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. 1.18 × 25 =
  2. 2.15 × 22 =
  3. 3.10 × 25 =
  4. 4.8 × 125 =
  5. 5.20 × 125 =
  6. 6.10 × 125 =
  7. 7.16 × 15 =
  8. 8.65 × 18 =
  9. 9.28 × 125 =
  10. 10.12 × 35 =
  11. 11.36 × 25 =
  12. 12.34 × 15 =
  13. 13.25 × 30 =
  14. 14.25 × 22 =
  15. 15.18 × 45 =
  16. 16.25 × 10 =
  17. 17.26 × 55 =
  18. 18.25 × 32 =
  19. 19.15 × 6 =
  20. 20.14 × 25 =
  21. 21.16 × 15 =
  22. 22.24 × 65 =
  23. 23.75 × 28 =
  24. 24.32 × 125 =
  25. 25.12 × 75 =
  26. 26.24 × 15 =
  27. 27.45 × 32 =
  28. 28.14 × 25 =
  29. 29.65 × 16 =
  30. 30.25 × 34 =
  31. 31.14 × 65 =
  32. 32.36 × 25 =
  33. 33.6 × 125 =
  34. 34.125 × 14 =
  35. 35.15 × 20 =
  36. 36.40 × 25 =
  37. 37.28 × 35 =
  38. 38.125 × 26 =
  39. 39.6 × 55 =
  40. 40.65 × 14 =

Answer key

  1. 450
  2. 330
  3. 250
  4. 1000
  5. 2500
  6. 1250
  7. 240
  8. 1170
  9. 3500
  10. 420
  11. 900
  12. 510
  13. 750
  14. 550
  15. 810
  16. 250
  17. 1430
  18. 800
  19. 90
  20. 350
  21. 240
  22. 1560
  23. 2100
  24. 4000
  25. 900
  26. 360
  27. 1440
  28. 350
  29. 1040
  30. 850
  31. 910
  32. 900
  33. 750
  34. 1750
  35. 300
  36. 1000
  37. 980
  38. 3250
  39. 330
  40. 910

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