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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 343 · 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. 1.34 × 55 =
  2. 2.26 × 55 =
  3. 3.125 × 12 =
  4. 4.12 × 75 =
  5. 5.55 × 8 =
  6. 6.65 × 16 =
  7. 7.10 × 55 =
  8. 8.45 × 18 =
  9. 9.15 × 12 =
  10. 10.65 × 12 =
  11. 11.14 × 125 =
  12. 12.35 × 14 =
  13. 13.8 × 15 =
  14. 14.65 × 32 =
  15. 15.15 × 18 =
  16. 16.25 × 36 =
  17. 17.45 × 36 =
  18. 18.35 × 8 =
  19. 19.8 × 35 =
  20. 20.35 × 30 =
  21. 21.55 × 32 =
  22. 22.12 × 65 =
  23. 23.18 × 45 =
  24. 24.22 × 25 =
  25. 25.16 × 15 =
  26. 26.55 × 12 =
  27. 27.35 × 6 =
  28. 28.12 × 45 =
  29. 29.125 × 10 =
  30. 30.75 × 28 =
  31. 31.75 × 12 =
  32. 32.25 × 10 =
  33. 33.125 × 20 =
  34. 34.16 × 25 =
  35. 35.6 × 25 =
  36. 36.15 × 22 =
  37. 37.75 × 30 =
  38. 38.40 × 45 =
  39. 39.45 × 26 =
  40. 40.36 × 25 =

Answer key

  1. 1870
  2. 1430
  3. 1500
  4. 900
  5. 440
  6. 1040
  7. 550
  8. 810
  9. 180
  10. 780
  11. 1750
  12. 490
  13. 120
  14. 2080
  15. 270
  16. 900
  17. 1620
  18. 280
  19. 280
  20. 1050
  21. 1760
  22. 780
  23. 810
  24. 550
  25. 240
  26. 660
  27. 210
  28. 540
  29. 1250
  30. 2100
  31. 900
  32. 250
  33. 2500
  34. 400
  35. 150
  36. 330
  37. 2250
  38. 1800
  39. 1170
  40. 900

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