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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 835 · 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. 1.12 × 55 =
  2. 2.30 × 25 =
  3. 3.10 × 55 =
  4. 4.75 × 14 =
  5. 5.55 × 20 =
  6. 6.20 × 75 =
  7. 7.16 × 25 =
  8. 8.55 × 12 =
  9. 9.55 × 6 =
  10. 10.28 × 15 =
  11. 11.24 × 125 =
  12. 12.25 × 6 =
  13. 13.125 × 34 =
  14. 14.6 × 125 =
  15. 15.35 × 40 =
  16. 16.125 × 22 =
  17. 17.55 × 12 =
  18. 18.25 × 10 =
  19. 19.125 × 8 =
  20. 20.18 × 75 =
  21. 21.24 × 45 =
  22. 22.25 × 40 =
  23. 23.55 × 6 =
  24. 24.34 × 35 =
  25. 25.125 × 8 =
  26. 26.12 × 65 =
  27. 27.35 × 14 =
  28. 28.10 × 125 =
  29. 29.20 × 25 =
  30. 30.15 × 8 =
  31. 31.22 × 125 =
  32. 32.45 × 32 =
  33. 33.55 × 20 =
  34. 34.30 × 35 =
  35. 35.25 × 8 =
  36. 36.20 × 25 =
  37. 37.15 × 26 =
  38. 38.55 × 32 =
  39. 39.6 × 65 =
  40. 40.65 × 10 =

Answer key

  1. 660
  2. 750
  3. 550
  4. 1050
  5. 1100
  6. 1500
  7. 400
  8. 660
  9. 330
  10. 420
  11. 3000
  12. 150
  13. 4250
  14. 750
  15. 1400
  16. 2750
  17. 660
  18. 250
  19. 1000
  20. 1350
  21. 1080
  22. 1000
  23. 330
  24. 1190
  25. 1000
  26. 780
  27. 490
  28. 1250
  29. 500
  30. 120
  31. 2750
  32. 1440
  33. 1100
  34. 1050
  35. 200
  36. 500
  37. 390
  38. 1760
  39. 390
  40. 650

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