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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 892 · 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. 1.24 × 75 =
  2. 2.75 × 14 =
  3. 3.75 × 24 =
  4. 4.36 × 125 =
  5. 5.65 × 32 =
  6. 6.22 × 65 =
  7. 7.14 × 125 =
  8. 8.15 × 26 =
  9. 9.125 × 20 =
  10. 10.34 × 45 =
  11. 11.55 × 16 =
  12. 12.125 × 28 =
  13. 13.65 × 32 =
  14. 14.16 × 35 =
  15. 15.30 × 25 =
  16. 16.75 × 24 =
  17. 17.25 × 20 =
  18. 18.22 × 45 =
  19. 19.125 × 32 =
  20. 20.35 × 26 =
  21. 21.34 × 15 =
  22. 22.8 × 25 =
  23. 23.75 × 20 =
  24. 24.65 × 8 =
  25. 25.28 × 45 =
  26. 26.40 × 125 =
  27. 27.40 × 45 =
  28. 28.45 × 26 =
  29. 29.35 × 10 =
  30. 30.34 × 25 =
  31. 31.35 × 34 =
  32. 32.15 × 10 =
  33. 33.75 × 22 =
  34. 34.18 × 125 =
  35. 35.6 × 15 =
  36. 36.45 × 14 =
  37. 37.65 × 30 =
  38. 38.24 × 25 =
  39. 39.35 × 10 =
  40. 40.15 × 40 =

Answer key

  1. 1800
  2. 1050
  3. 1800
  4. 4500
  5. 2080
  6. 1430
  7. 1750
  8. 390
  9. 2500
  10. 1530
  11. 880
  12. 3500
  13. 2080
  14. 560
  15. 750
  16. 1800
  17. 500
  18. 990
  19. 4000
  20. 910
  21. 510
  22. 200
  23. 1500
  24. 520
  25. 1260
  26. 5000
  27. 1800
  28. 1170
  29. 350
  30. 850
  31. 1190
  32. 150
  33. 1650
  34. 2250
  35. 90
  36. 630
  37. 1950
  38. 600
  39. 350
  40. 600

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