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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 536 · 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. 1.25 × 6 =
  2. 2.75 × 20 =
  3. 3.55 × 18 =
  4. 4.45 × 16 =
  5. 5.65 × 8 =
  6. 6.36 × 35 =
  7. 7.55 × 10 =
  8. 8.12 × 75 =
  9. 9.25 × 38 =
  10. 10.6 × 15 =
  11. 11.38 × 75 =
  12. 12.10 × 25 =
  13. 13.12 × 45 =
  14. 14.15 × 6 =
  15. 15.22 × 15 =
  16. 16.25 × 8 =
  17. 17.65 × 28 =
  18. 18.65 × 24 =
  19. 19.28 × 15 =
  20. 20.65 × 30 =
  21. 21.36 × 15 =
  22. 22.30 × 65 =
  23. 23.38 × 45 =
  24. 24.26 × 35 =
  25. 25.125 × 38 =
  26. 26.35 × 32 =
  27. 27.15 × 20 =
  28. 28.6 × 45 =
  29. 29.65 × 12 =
  30. 30.35 × 8 =
  31. 31.125 × 30 =
  32. 32.25 × 32 =
  33. 33.36 × 75 =
  34. 34.25 × 32 =
  35. 35.55 × 36 =
  36. 36.40 × 125 =
  37. 37.8 × 75 =
  38. 38.45 × 34 =
  39. 39.28 × 25 =
  40. 40.75 × 8 =

Answer key

  1. 150
  2. 1500
  3. 990
  4. 720
  5. 520
  6. 1260
  7. 550
  8. 900
  9. 950
  10. 90
  11. 2850
  12. 250
  13. 540
  14. 90
  15. 330
  16. 200
  17. 1820
  18. 1560
  19. 420
  20. 1950
  21. 540
  22. 1950
  23. 1710
  24. 910
  25. 4750
  26. 1120
  27. 300
  28. 270
  29. 780
  30. 280
  31. 3750
  32. 800
  33. 2700
  34. 800
  35. 1980
  36. 5000
  37. 600
  38. 1530
  39. 700
  40. 600

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