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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 300 · 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. 1.25 × 26 =
  2. 2.16 × 15 =
  3. 3.55 × 36 =
  4. 4.75 × 14 =
  5. 5.32 × 25 =
  6. 6.6 × 25 =
  7. 7.6 × 35 =
  8. 8.18 × 15 =
  9. 9.65 × 34 =
  10. 10.35 × 18 =
  11. 11.34 × 15 =
  12. 12.25 × 10 =
  13. 13.65 × 10 =
  14. 14.55 × 28 =
  15. 15.15 × 32 =
  16. 16.10 × 75 =
  17. 17.125 × 12 =
  18. 18.65 × 28 =
  19. 19.15 × 10 =
  20. 20.14 × 125 =
  21. 21.35 × 34 =
  22. 22.55 × 26 =
  23. 23.25 × 38 =
  24. 24.25 × 32 =
  25. 25.40 × 15 =
  26. 26.25 × 26 =
  27. 27.75 × 6 =
  28. 28.14 × 15 =
  29. 29.15 × 10 =
  30. 30.65 × 10 =
  31. 31.6 × 75 =
  32. 32.14 × 75 =
  33. 33.35 × 28 =
  34. 34.65 × 12 =
  35. 35.38 × 25 =
  36. 36.15 × 40 =
  37. 37.125 × 34 =
  38. 38.38 × 55 =
  39. 39.65 × 28 =
  40. 40.45 × 26 =

Answer key

  1. 650
  2. 240
  3. 1980
  4. 1050
  5. 800
  6. 150
  7. 210
  8. 270
  9. 2210
  10. 630
  11. 510
  12. 250
  13. 650
  14. 1540
  15. 480
  16. 750
  17. 1500
  18. 1820
  19. 150
  20. 1750
  21. 1190
  22. 1430
  23. 950
  24. 800
  25. 600
  26. 650
  27. 450
  28. 210
  29. 150
  30. 650
  31. 450
  32. 1050
  33. 980
  34. 780
  35. 950
  36. 600
  37. 4250
  38. 2090
  39. 1820
  40. 1170

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