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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 985 · 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. 1.55 × 22 =
  2. 2.6 × 65 =
  3. 3.45 × 8 =
  4. 4.15 × 10 =
  5. 5.55 × 22 =
  6. 6.40 × 25 =
  7. 7.14 × 55 =
  8. 8.18 × 45 =
  9. 9.28 × 15 =
  10. 10.75 × 32 =
  11. 11.16 × 125 =
  12. 12.55 × 14 =
  13. 13.45 × 8 =
  14. 14.14 × 125 =
  15. 15.125 × 8 =
  16. 16.15 × 28 =
  17. 17.8 × 15 =
  18. 18.6 × 15 =
  19. 19.125 × 26 =
  20. 20.18 × 25 =
  21. 21.18 × 15 =
  22. 22.8 × 45 =
  23. 23.20 × 35 =
  24. 24.35 × 16 =
  25. 25.20 × 55 =
  26. 26.35 × 24 =
  27. 27.34 × 25 =
  28. 28.65 × 38 =
  29. 29.32 × 55 =
  30. 30.10 × 25 =
  31. 31.38 × 15 =
  32. 32.10 × 55 =
  33. 33.75 × 14 =
  34. 34.28 × 65 =
  35. 35.34 × 25 =
  36. 36.20 × 45 =
  37. 37.15 × 8 =
  38. 38.75 × 36 =
  39. 39.30 × 15 =
  40. 40.125 × 10 =

Answer key

  1. 1210
  2. 390
  3. 360
  4. 150
  5. 1210
  6. 1000
  7. 770
  8. 810
  9. 420
  10. 2400
  11. 2000
  12. 770
  13. 360
  14. 1750
  15. 1000
  16. 420
  17. 120
  18. 90
  19. 3250
  20. 450
  21. 270
  22. 360
  23. 700
  24. 560
  25. 1100
  26. 840
  27. 850
  28. 2470
  29. 1760
  30. 250
  31. 570
  32. 550
  33. 1050
  34. 1820
  35. 850
  36. 900
  37. 120
  38. 2700
  39. 450
  40. 1250

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