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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 738 · 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 × 14 =
  2. 2.55 × 22 =
  3. 3.45 × 36 =
  4. 4.28 × 45 =
  5. 5.55 × 12 =
  6. 6.16 × 125 =
  7. 7.16 × 25 =
  8. 8.75 × 32 =
  9. 9.35 × 6 =
  10. 10.25 × 24 =
  11. 11.36 × 55 =
  12. 12.65 × 12 =
  13. 13.36 × 125 =
  14. 14.55 × 38 =
  15. 15.65 × 40 =
  16. 16.22 × 125 =
  17. 17.15 × 26 =
  18. 18.8 × 35 =
  19. 19.125 × 38 =
  20. 20.10 × 15 =
  21. 21.38 × 65 =
  22. 22.10 × 65 =
  23. 23.45 × 34 =
  24. 24.6 × 75 =
  25. 25.25 × 32 =
  26. 26.14 × 45 =
  27. 27.35 × 26 =
  28. 28.15 × 36 =
  29. 29.20 × 75 =
  30. 30.25 × 16 =
  31. 31.38 × 55 =
  32. 32.30 × 125 =
  33. 33.65 × 26 =
  34. 34.25 × 34 =
  35. 35.24 × 45 =
  36. 36.25 × 24 =
  37. 37.55 × 10 =
  38. 38.28 × 35 =
  39. 39.8 × 45 =
  40. 40.22 × 75 =

Answer key

  1. 1750
  2. 1210
  3. 1620
  4. 1260
  5. 660
  6. 2000
  7. 400
  8. 2400
  9. 210
  10. 600
  11. 1980
  12. 780
  13. 4500
  14. 2090
  15. 2600
  16. 2750
  17. 390
  18. 280
  19. 4750
  20. 150
  21. 2470
  22. 650
  23. 1530
  24. 450
  25. 800
  26. 630
  27. 910
  28. 540
  29. 1500
  30. 400
  31. 2090
  32. 3750
  33. 1690
  34. 850
  35. 1080
  36. 600
  37. 550
  38. 980
  39. 360
  40. 1650

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