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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 715 · 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. 1.26 × 45 =
  2. 2.125 × 28 =
  3. 3.14 × 75 =
  4. 4.65 × 40 =
  5. 5.75 × 40 =
  6. 6.45 × 16 =
  7. 7.35 × 10 =
  8. 8.35 × 6 =
  9. 9.15 × 26 =
  10. 10.35 × 16 =
  11. 11.10 × 75 =
  12. 12.12 × 35 =
  13. 13.125 × 14 =
  14. 14.12 × 25 =
  15. 15.55 × 30 =
  16. 16.45 × 16 =
  17. 17.30 × 55 =
  18. 18.28 × 125 =
  19. 19.8 × 45 =
  20. 20.30 × 45 =
  21. 21.65 × 6 =
  22. 22.25 × 30 =
  23. 23.10 × 45 =
  24. 24.125 × 6 =
  25. 25.22 × 45 =
  26. 26.20 × 25 =
  27. 27.65 × 36 =
  28. 28.6 × 35 =
  29. 29.25 × 38 =
  30. 30.18 × 45 =
  31. 31.25 × 6 =
  32. 32.28 × 125 =
  33. 33.18 × 35 =
  34. 34.24 × 125 =
  35. 35.75 × 32 =
  36. 36.55 × 8 =
  37. 37.55 × 10 =
  38. 38.35 × 8 =
  39. 39.125 × 26 =
  40. 40.45 × 32 =

Answer key

  1. 1170
  2. 3500
  3. 1050
  4. 2600
  5. 3000
  6. 720
  7. 350
  8. 210
  9. 390
  10. 560
  11. 750
  12. 420
  13. 1750
  14. 300
  15. 1650
  16. 720
  17. 1650
  18. 3500
  19. 360
  20. 1350
  21. 390
  22. 750
  23. 450
  24. 750
  25. 990
  26. 500
  27. 2340
  28. 210
  29. 950
  30. 810
  31. 150
  32. 3500
  33. 630
  34. 3000
  35. 2400
  36. 440
  37. 550
  38. 280
  39. 3250
  40. 1440

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