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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 397 · 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 × 36 =
  2. 2.24 × 55 =
  3. 3.25 × 20 =
  4. 4.25 × 8 =
  5. 5.55 × 8 =
  6. 6.55 × 16 =
  7. 7.45 × 40 =
  8. 8.28 × 25 =
  9. 9.8 × 75 =
  10. 10.35 × 30 =
  11. 11.45 × 8 =
  12. 12.28 × 15 =
  13. 13.14 × 25 =
  14. 14.75 × 30 =
  15. 15.35 × 10 =
  16. 16.38 × 45 =
  17. 17.75 × 28 =
  18. 18.45 × 16 =
  19. 19.36 × 65 =
  20. 20.34 × 25 =
  21. 21.15 × 10 =
  22. 22.55 × 38 =
  23. 23.55 × 16 =
  24. 24.75 × 32 =
  25. 25.65 × 6 =
  26. 26.16 × 15 =
  27. 27.75 × 30 =
  28. 28.55 × 8 =
  29. 29.45 × 28 =
  30. 30.18 × 45 =
  31. 31.15 × 24 =
  32. 32.15 × 12 =
  33. 33.75 × 30 =
  34. 34.6 × 125 =
  35. 35.55 × 38 =
  36. 36.45 × 8 =
  37. 37.25 × 6 =
  38. 38.75 × 40 =
  39. 39.34 × 25 =
  40. 40.75 × 34 =

Answer key

  1. 2340
  2. 1320
  3. 500
  4. 200
  5. 440
  6. 880
  7. 1800
  8. 700
  9. 600
  10. 1050
  11. 360
  12. 420
  13. 350
  14. 2250
  15. 350
  16. 1710
  17. 2100
  18. 720
  19. 2340
  20. 850
  21. 150
  22. 2090
  23. 880
  24. 2400
  25. 390
  26. 240
  27. 2250
  28. 440
  29. 1260
  30. 810
  31. 360
  32. 180
  33. 2250
  34. 750
  35. 2090
  36. 360
  37. 150
  38. 3000
  39. 850
  40. 2550

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