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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 459 · 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. 1.36 × 75 =
  2. 2.34 × 75 =
  3. 3.16 × 55 =
  4. 4.28 × 45 =
  5. 5.35 × 40 =
  6. 6.35 × 12 =
  7. 7.14 × 15 =
  8. 8.36 × 55 =
  9. 9.15 × 30 =
  10. 10.125 × 24 =
  11. 11.125 × 40 =
  12. 12.45 × 22 =
  13. 13.25 × 36 =
  14. 14.6 × 75 =
  15. 15.26 × 35 =
  16. 16.45 × 40 =
  17. 17.12 × 125 =
  18. 18.45 × 32 =
  19. 19.22 × 15 =
  20. 20.10 × 125 =
  21. 21.15 × 6 =
  22. 22.35 × 12 =
  23. 23.12 × 125 =
  24. 24.10 × 25 =
  25. 25.34 × 35 =
  26. 26.65 × 30 =
  27. 27.24 × 75 =
  28. 28.55 × 34 =
  29. 29.38 × 45 =
  30. 30.15 × 8 =
  31. 31.6 × 65 =
  32. 32.30 × 35 =
  33. 33.125 × 12 =
  34. 34.15 × 26 =
  35. 35.75 × 24 =
  36. 36.40 × 15 =
  37. 37.28 × 35 =
  38. 38.75 × 8 =
  39. 39.35 × 28 =
  40. 40.28 × 35 =

Answer key

  1. 2700
  2. 2550
  3. 880
  4. 1260
  5. 1400
  6. 420
  7. 210
  8. 1980
  9. 450
  10. 3000
  11. 5000
  12. 990
  13. 900
  14. 450
  15. 910
  16. 1800
  17. 1500
  18. 1440
  19. 330
  20. 1250
  21. 90
  22. 420
  23. 1500
  24. 250
  25. 1190
  26. 1950
  27. 1800
  28. 1870
  29. 1710
  30. 120
  31. 390
  32. 1050
  33. 1500
  34. 390
  35. 1800
  36. 600
  37. 980
  38. 600
  39. 980
  40. 980

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