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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 799 · 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. 1.22 × 125 =
  2. 2.20 × 15 =
  3. 3.35 × 8 =
  4. 4.15 × 20 =
  5. 5.25 × 14 =
  6. 6.45 × 26 =
  7. 7.26 × 15 =
  8. 8.24 × 55 =
  9. 9.125 × 14 =
  10. 10.25 × 18 =
  11. 11.28 × 35 =
  12. 12.35 × 8 =
  13. 13.25 × 8 =
  14. 14.12 × 45 =
  15. 15.25 × 40 =
  16. 16.65 × 24 =
  17. 17.12 × 55 =
  18. 18.8 × 75 =
  19. 19.38 × 75 =
  20. 20.125 × 34 =
  21. 21.35 × 34 =
  22. 22.22 × 25 =
  23. 23.16 × 35 =
  24. 24.34 × 25 =
  25. 25.34 × 55 =
  26. 26.16 × 25 =
  27. 27.25 × 12 =
  28. 28.40 × 55 =
  29. 29.14 × 35 =
  30. 30.6 × 125 =
  31. 31.65 × 6 =
  32. 32.125 × 8 =
  33. 33.15 × 20 =
  34. 34.14 × 125 =
  35. 35.36 × 25 =
  36. 36.15 × 28 =
  37. 37.15 × 6 =
  38. 38.45 × 30 =
  39. 39.20 × 15 =
  40. 40.45 × 26 =

Answer key

  1. 2750
  2. 300
  3. 280
  4. 300
  5. 350
  6. 1170
  7. 390
  8. 1320
  9. 1750
  10. 450
  11. 980
  12. 280
  13. 200
  14. 540
  15. 1000
  16. 1560
  17. 660
  18. 600
  19. 2850
  20. 4250
  21. 1190
  22. 550
  23. 560
  24. 850
  25. 1870
  26. 400
  27. 300
  28. 2200
  29. 490
  30. 750
  31. 390
  32. 1000
  33. 300
  34. 1750
  35. 900
  36. 420
  37. 90
  38. 1350
  39. 300
  40. 1170

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