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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 239 · 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. 1.24 × 75 =
  2. 2.45 × 28 =
  3. 3.55 × 18 =
  4. 4.6 × 15 =
  5. 5.75 × 36 =
  6. 6.55 × 24 =
  7. 7.32 × 35 =
  8. 8.15 × 22 =
  9. 9.8 × 25 =
  10. 10.26 × 55 =
  11. 11.75 × 6 =
  12. 12.6 × 75 =
  13. 13.15 × 18 =
  14. 14.75 × 8 =
  15. 15.14 × 75 =
  16. 16.35 × 8 =
  17. 17.125 × 18 =
  18. 18.15 × 14 =
  19. 19.25 × 12 =
  20. 20.35 × 12 =
  21. 21.36 × 125 =
  22. 22.24 × 15 =
  23. 23.25 × 30 =
  24. 24.25 × 6 =
  25. 25.65 × 6 =
  26. 26.45 × 12 =
  27. 27.34 × 35 =
  28. 28.14 × 55 =
  29. 29.36 × 55 =
  30. 30.24 × 25 =
  31. 31.45 × 8 =
  32. 32.14 × 25 =
  33. 33.15 × 24 =
  34. 34.35 × 40 =
  35. 35.125 × 22 =
  36. 36.20 × 75 =
  37. 37.25 × 36 =
  38. 38.55 × 34 =
  39. 39.34 × 65 =
  40. 40.18 × 55 =

Answer key

  1. 1800
  2. 1260
  3. 990
  4. 90
  5. 2700
  6. 1320
  7. 1120
  8. 330
  9. 200
  10. 1430
  11. 450
  12. 450
  13. 270
  14. 600
  15. 1050
  16. 280
  17. 2250
  18. 210
  19. 300
  20. 420
  21. 4500
  22. 360
  23. 750
  24. 150
  25. 390
  26. 540
  27. 1190
  28. 770
  29. 1980
  30. 600
  31. 360
  32. 350
  33. 360
  34. 1400
  35. 2750
  36. 1500
  37. 900
  38. 1870
  39. 2210
  40. 990

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