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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 201 · 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. 1.75 × 26 =
  2. 2.24 × 35 =
  3. 3.12 × 25 =
  4. 4.25 × 30 =
  5. 5.16 × 55 =
  6. 6.55 × 8 =
  7. 7.10 × 35 =
  8. 8.28 × 15 =
  9. 9.15 × 14 =
  10. 10.55 × 30 =
  11. 11.6 × 35 =
  12. 12.65 × 32 =
  13. 13.28 × 65 =
  14. 14.15 × 32 =
  15. 15.14 × 65 =
  16. 16.40 × 75 =
  17. 17.75 × 38 =
  18. 18.26 × 55 =
  19. 19.16 × 35 =
  20. 20.45 × 20 =
  21. 21.40 × 45 =
  22. 22.125 × 14 =
  23. 23.15 × 6 =
  24. 24.34 × 55 =
  25. 25.24 × 25 =
  26. 26.45 × 24 =
  27. 27.125 × 40 =
  28. 28.8 × 75 =
  29. 29.15 × 10 =
  30. 30.15 × 34 =
  31. 31.32 × 15 =
  32. 32.35 × 36 =
  33. 33.30 × 125 =
  34. 34.125 × 24 =
  35. 35.6 × 75 =
  36. 36.34 × 25 =
  37. 37.75 × 16 =
  38. 38.25 × 6 =
  39. 39.16 × 75 =
  40. 40.125 × 28 =

Answer key

  1. 1950
  2. 840
  3. 300
  4. 750
  5. 880
  6. 440
  7. 350
  8. 420
  9. 210
  10. 1650
  11. 210
  12. 2080
  13. 1820
  14. 480
  15. 910
  16. 3000
  17. 2850
  18. 1430
  19. 560
  20. 900
  21. 1800
  22. 1750
  23. 90
  24. 1870
  25. 600
  26. 1080
  27. 5000
  28. 600
  29. 150
  30. 510
  31. 480
  32. 1260
  33. 3750
  34. 3000
  35. 450
  36. 850
  37. 1200
  38. 150
  39. 1200
  40. 3500

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