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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 859 · 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. 1.35 × 34 =
  2. 2.26 × 55 =
  3. 3.35 × 40 =
  4. 4.65 × 32 =
  5. 5.25 × 12 =
  6. 6.6 × 15 =
  7. 7.65 × 40 =
  8. 8.36 × 25 =
  9. 9.15 × 28 =
  10. 10.75 × 6 =
  11. 11.55 × 36 =
  12. 12.25 × 6 =
  13. 13.25 × 8 =
  14. 14.55 × 34 =
  15. 15.45 × 8 =
  16. 16.8 × 35 =
  17. 17.20 × 75 =
  18. 18.75 × 30 =
  19. 19.15 × 38 =
  20. 20.75 × 24 =
  21. 21.65 × 22 =
  22. 22.25 × 6 =
  23. 23.15 × 38 =
  24. 24.15 × 10 =
  25. 25.10 × 15 =
  26. 26.35 × 36 =
  27. 27.15 × 6 =
  28. 28.30 × 125 =
  29. 29.65 × 28 =
  30. 30.75 × 38 =
  31. 31.45 × 6 =
  32. 32.20 × 65 =
  33. 33.20 × 45 =
  34. 34.16 × 75 =
  35. 35.65 × 32 =
  36. 36.30 × 45 =
  37. 37.55 × 12 =
  38. 38.14 × 25 =
  39. 39.55 × 10 =
  40. 40.15 × 12 =

Answer key

  1. 1190
  2. 1430
  3. 1400
  4. 2080
  5. 300
  6. 90
  7. 2600
  8. 900
  9. 420
  10. 450
  11. 1980
  12. 150
  13. 200
  14. 1870
  15. 360
  16. 280
  17. 1500
  18. 2250
  19. 570
  20. 1800
  21. 1430
  22. 150
  23. 570
  24. 150
  25. 150
  26. 1260
  27. 90
  28. 3750
  29. 1820
  30. 2850
  31. 270
  32. 1300
  33. 900
  34. 1200
  35. 2080
  36. 1350
  37. 660
  38. 350
  39. 550
  40. 180

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