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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 53 · 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. 1.28 × 45 =
  2. 2.28 × 55 =
  3. 3.75 × 24 =
  4. 4.25 × 22 =
  5. 5.20 × 125 =
  6. 6.38 × 75 =
  7. 7.75 × 34 =
  8. 8.25 × 40 =
  9. 9.30 × 65 =
  10. 10.55 × 16 =
  11. 11.22 × 25 =
  12. 12.65 × 34 =
  13. 13.35 × 38 =
  14. 14.15 × 16 =
  15. 15.32 × 55 =
  16. 16.32 × 15 =
  17. 17.40 × 15 =
  18. 18.45 × 14 =
  19. 19.26 × 75 =
  20. 20.65 × 6 =
  21. 21.38 × 55 =
  22. 22.14 × 125 =
  23. 23.45 × 38 =
  24. 24.25 × 14 =
  25. 25.55 × 14 =
  26. 26.8 × 15 =
  27. 27.10 × 25 =
  28. 28.6 × 65 =
  29. 29.75 × 10 =
  30. 30.32 × 35 =
  31. 31.12 × 25 =
  32. 32.8 × 25 =
  33. 33.8 × 125 =
  34. 34.40 × 45 =
  35. 35.75 × 18 =
  36. 36.125 × 8 =
  37. 37.45 × 32 =
  38. 38.15 × 10 =
  39. 39.25 × 26 =
  40. 40.15 × 12 =

Answer key

  1. 1260
  2. 1540
  3. 1800
  4. 550
  5. 2500
  6. 2850
  7. 2550
  8. 1000
  9. 1950
  10. 880
  11. 550
  12. 2210
  13. 1330
  14. 240
  15. 1760
  16. 480
  17. 600
  18. 630
  19. 1950
  20. 390
  21. 2090
  22. 1750
  23. 1710
  24. 350
  25. 770
  26. 120
  27. 250
  28. 390
  29. 750
  30. 1120
  31. 300
  32. 200
  33. 1000
  34. 1800
  35. 1350
  36. 1000
  37. 1440
  38. 150
  39. 650
  40. 180

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