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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 604 · 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. 1.20 × 25 =
  2. 2.40 × 15 =
  3. 3.35 × 8 =
  4. 4.45 × 36 =
  5. 5.45 × 32 =
  6. 6.25 × 36 =
  7. 7.45 × 6 =
  8. 8.75 × 6 =
  9. 9.125 × 12 =
  10. 10.10 × 35 =
  11. 11.35 × 40 =
  12. 12.65 × 6 =
  13. 13.22 × 15 =
  14. 14.25 × 26 =
  15. 15.65 × 24 =
  16. 16.15 × 38 =
  17. 17.22 × 25 =
  18. 18.125 × 6 =
  19. 19.15 × 6 =
  20. 20.26 × 25 =
  21. 21.38 × 45 =
  22. 22.55 × 32 =
  23. 23.40 × 25 =
  24. 24.35 × 18 =
  25. 25.30 × 55 =
  26. 26.55 × 24 =
  27. 27.55 × 38 =
  28. 28.40 × 75 =
  29. 29.35 × 6 =
  30. 30.55 × 6 =
  31. 31.8 × 75 =
  32. 32.22 × 65 =
  33. 33.32 × 125 =
  34. 34.16 × 125 =
  35. 35.75 × 30 =
  36. 36.32 × 55 =
  37. 37.25 × 14 =
  38. 38.125 × 22 =
  39. 39.10 × 25 =
  40. 40.8 × 35 =

Answer key

  1. 500
  2. 600
  3. 280
  4. 1620
  5. 1440
  6. 900
  7. 270
  8. 450
  9. 1500
  10. 350
  11. 1400
  12. 390
  13. 330
  14. 650
  15. 1560
  16. 570
  17. 550
  18. 750
  19. 90
  20. 650
  21. 1710
  22. 1760
  23. 1000
  24. 630
  25. 1650
  26. 1320
  27. 2090
  28. 3000
  29. 210
  30. 330
  31. 600
  32. 1430
  33. 4000
  34. 2000
  35. 2250
  36. 1760
  37. 350
  38. 2750
  39. 250
  40. 280

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