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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 600 · 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. 1.25 × 10 =
  2. 2.35 × 38 =
  3. 3.45 × 12 =
  4. 4.65 × 12 =
  5. 5.20 × 25 =
  6. 6.15 × 14 =
  7. 7.35 × 34 =
  8. 8.125 × 36 =
  9. 9.38 × 15 =
  10. 10.40 × 25 =
  11. 11.24 × 65 =
  12. 12.14 × 125 =
  13. 13.15 × 36 =
  14. 14.15 × 8 =
  15. 15.125 × 36 =
  16. 16.25 × 18 =
  17. 17.75 × 36 =
  18. 18.125 × 40 =
  19. 19.22 × 25 =
  20. 20.32 × 45 =
  21. 21.125 × 12 =
  22. 22.45 × 14 =
  23. 23.25 × 8 =
  24. 24.40 × 55 =
  25. 25.32 × 55 =
  26. 26.75 × 10 =
  27. 27.26 × 15 =
  28. 28.22 × 65 =
  29. 29.35 × 10 =
  30. 30.45 × 36 =
  31. 31.15 × 24 =
  32. 32.75 × 32 =
  33. 33.75 × 8 =
  34. 34.25 × 34 =
  35. 35.28 × 15 =
  36. 36.20 × 125 =
  37. 37.125 × 6 =
  38. 38.55 × 26 =
  39. 39.15 × 14 =
  40. 40.18 × 45 =

Answer key

  1. 250
  2. 1330
  3. 540
  4. 780
  5. 500
  6. 210
  7. 1190
  8. 4500
  9. 570
  10. 1000
  11. 1560
  12. 1750
  13. 540
  14. 120
  15. 4500
  16. 450
  17. 2700
  18. 5000
  19. 550
  20. 1440
  21. 1500
  22. 630
  23. 200
  24. 2200
  25. 1760
  26. 750
  27. 390
  28. 1430
  29. 350
  30. 1620
  31. 360
  32. 2400
  33. 600
  34. 850
  35. 420
  36. 2500
  37. 750
  38. 1430
  39. 210
  40. 810

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