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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 924 · 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. 1.22 × 75 =
  2. 2.36 × 25 =
  3. 3.6 × 125 =
  4. 4.28 × 75 =
  5. 5.25 × 10 =
  6. 6.35 × 16 =
  7. 7.8 × 125 =
  8. 8.32 × 75 =
  9. 9.15 × 20 =
  10. 10.38 × 25 =
  11. 11.15 × 12 =
  12. 12.65 × 8 =
  13. 13.45 × 20 =
  14. 14.32 × 25 =
  15. 15.24 × 35 =
  16. 16.36 × 55 =
  17. 17.125 × 12 =
  18. 18.125 × 16 =
  19. 19.45 × 28 =
  20. 20.65 × 20 =
  21. 21.45 × 14 =
  22. 22.35 × 20 =
  23. 23.38 × 65 =
  24. 24.55 × 18 =
  25. 25.25 × 30 =
  26. 26.25 × 34 =
  27. 27.45 × 32 =
  28. 28.15 × 22 =
  29. 29.125 × 28 =
  30. 30.26 × 125 =
  31. 31.25 × 24 =
  32. 32.16 × 35 =
  33. 33.125 × 28 =
  34. 34.55 × 6 =
  35. 35.45 × 26 =
  36. 36.65 × 38 =
  37. 37.65 × 40 =
  38. 38.20 × 35 =
  39. 39.15 × 10 =
  40. 40.6 × 25 =

Answer key

  1. 1650
  2. 900
  3. 750
  4. 2100
  5. 250
  6. 560
  7. 1000
  8. 2400
  9. 300
  10. 950
  11. 180
  12. 520
  13. 900
  14. 800
  15. 840
  16. 1980
  17. 1500
  18. 2000
  19. 1260
  20. 1300
  21. 630
  22. 700
  23. 2470
  24. 990
  25. 750
  26. 850
  27. 1440
  28. 330
  29. 3500
  30. 3250
  31. 600
  32. 560
  33. 3500
  34. 330
  35. 1170
  36. 2470
  37. 2600
  38. 700
  39. 150
  40. 150

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