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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 998 · 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 × 14 =
  2. 2.55 × 14 =
  3. 3.65 × 24 =
  4. 4.25 × 26 =
  5. 5.125 × 28 =
  6. 6.36 × 15 =
  7. 7.15 × 40 =
  8. 8.75 × 14 =
  9. 9.55 × 36 =
  10. 10.38 × 75 =
  11. 11.125 × 6 =
  12. 12.38 × 15 =
  13. 13.55 × 24 =
  14. 14.35 × 16 =
  15. 15.25 × 32 =
  16. 16.28 × 125 =
  17. 17.45 × 24 =
  18. 18.36 × 15 =
  19. 19.35 × 20 =
  20. 20.34 × 15 =
  21. 21.25 × 40 =
  22. 22.30 × 125 =
  23. 23.8 × 125 =
  24. 24.32 × 125 =
  25. 25.28 × 55 =
  26. 26.36 × 15 =
  27. 27.25 × 26 =
  28. 28.55 × 30 =
  29. 29.14 × 25 =
  30. 30.75 × 26 =
  31. 31.16 × 55 =
  32. 32.65 × 14 =
  33. 33.55 × 8 =
  34. 34.25 × 26 =
  35. 35.20 × 15 =
  36. 36.45 × 20 =
  37. 37.30 × 55 =
  38. 38.32 × 75 =
  39. 39.25 × 28 =
  40. 40.125 × 22 =

Answer key

  1. 490
  2. 770
  3. 1560
  4. 650
  5. 3500
  6. 540
  7. 600
  8. 1050
  9. 1980
  10. 2850
  11. 750
  12. 570
  13. 1320
  14. 560
  15. 800
  16. 3500
  17. 1080
  18. 540
  19. 700
  20. 510
  21. 1000
  22. 3750
  23. 1000
  24. 4000
  25. 1540
  26. 540
  27. 650
  28. 1650
  29. 350
  30. 1950
  31. 880
  32. 910
  33. 440
  34. 650
  35. 300
  36. 900
  37. 1650
  38. 2400
  39. 700
  40. 2750

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