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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 768 · 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. 1.65 × 30 =
  2. 2.75 × 40 =
  3. 3.24 × 55 =
  4. 4.125 × 14 =
  5. 5.25 × 40 =
  6. 6.65 × 34 =
  7. 7.36 × 45 =
  8. 8.16 × 125 =
  9. 9.35 × 6 =
  10. 10.15 × 24 =
  11. 11.24 × 15 =
  12. 12.14 × 15 =
  13. 13.75 × 12 =
  14. 14.14 × 45 =
  15. 15.8 × 15 =
  16. 16.16 × 35 =
  17. 17.40 × 55 =
  18. 18.45 × 38 =
  19. 19.22 × 35 =
  20. 20.26 × 45 =
  21. 21.65 × 32 =
  22. 22.55 × 34 =
  23. 23.24 × 25 =
  24. 24.75 × 30 =
  25. 25.65 × 18 =
  26. 26.25 × 8 =
  27. 27.35 × 36 =
  28. 28.28 × 65 =
  29. 29.25 × 14 =
  30. 30.45 × 8 =
  31. 31.55 × 14 =
  32. 32.45 × 38 =
  33. 33.28 × 45 =
  34. 34.22 × 25 =
  35. 35.25 × 24 =
  36. 36.26 × 35 =
  37. 37.32 × 75 =
  38. 38.25 × 28 =
  39. 39.15 × 26 =
  40. 40.38 × 15 =

Answer key

  1. 1950
  2. 3000
  3. 1320
  4. 1750
  5. 1000
  6. 2210
  7. 1620
  8. 2000
  9. 210
  10. 360
  11. 360
  12. 210
  13. 900
  14. 630
  15. 120
  16. 560
  17. 2200
  18. 1710
  19. 770
  20. 1170
  21. 2080
  22. 1870
  23. 600
  24. 2250
  25. 1170
  26. 200
  27. 1260
  28. 1820
  29. 350
  30. 360
  31. 770
  32. 1710
  33. 1260
  34. 550
  35. 600
  36. 910
  37. 2400
  38. 700
  39. 390
  40. 570

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