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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 116 · 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. 1.125 × 10 =
  2. 2.65 × 34 =
  3. 3.28 × 15 =
  4. 4.6 × 35 =
  5. 5.6 × 75 =
  6. 6.25 × 32 =
  7. 7.30 × 15 =
  8. 8.40 × 75 =
  9. 9.36 × 45 =
  10. 10.18 × 15 =
  11. 11.15 × 6 =
  12. 12.45 × 16 =
  13. 13.125 × 22 =
  14. 14.18 × 55 =
  15. 15.55 × 34 =
  16. 16.55 × 22 =
  17. 17.125 × 20 =
  18. 18.15 × 6 =
  19. 19.28 × 125 =
  20. 20.55 × 12 =
  21. 21.24 × 125 =
  22. 22.125 × 18 =
  23. 23.32 × 55 =
  24. 24.125 × 6 =
  25. 25.20 × 35 =
  26. 26.40 × 65 =
  27. 27.65 × 26 =
  28. 28.18 × 75 =
  29. 29.36 × 55 =
  30. 30.15 × 20 =
  31. 31.25 × 6 =
  32. 32.45 × 24 =
  33. 33.25 × 24 =
  34. 34.25 × 34 =
  35. 35.55 × 30 =
  36. 36.65 × 12 =
  37. 37.75 × 8 =
  38. 38.34 × 45 =
  39. 39.55 × 30 =
  40. 40.15 × 14 =

Answer key

  1. 1250
  2. 2210
  3. 420
  4. 210
  5. 450
  6. 800
  7. 450
  8. 3000
  9. 1620
  10. 270
  11. 90
  12. 720
  13. 2750
  14. 990
  15. 1870
  16. 1210
  17. 2500
  18. 90
  19. 3500
  20. 660
  21. 3000
  22. 2250
  23. 1760
  24. 750
  25. 700
  26. 2600
  27. 1690
  28. 1350
  29. 1980
  30. 300
  31. 150
  32. 1080
  33. 600
  34. 850
  35. 1650
  36. 780
  37. 600
  38. 1530
  39. 1650
  40. 210

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