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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 888 · 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. 1.15 × 24 =
  2. 2.16 × 55 =
  3. 3.6 × 55 =
  4. 4.25 × 30 =
  5. 5.16 × 35 =
  6. 6.65 × 14 =
  7. 7.15 × 24 =
  8. 8.28 × 55 =
  9. 9.35 × 10 =
  10. 10.125 × 36 =
  11. 11.15 × 8 =
  12. 12.75 × 24 =
  13. 13.55 × 40 =
  14. 14.75 × 12 =
  15. 15.6 × 125 =
  16. 16.75 × 16 =
  17. 17.15 × 14 =
  18. 18.6 × 35 =
  19. 19.65 × 32 =
  20. 20.45 × 6 =
  21. 21.16 × 75 =
  22. 22.12 × 75 =
  23. 23.16 × 55 =
  24. 24.65 × 30 =
  25. 25.25 × 10 =
  26. 26.18 × 25 =
  27. 27.25 × 26 =
  28. 28.8 × 15 =
  29. 29.75 × 38 =
  30. 30.28 × 75 =
  31. 31.36 × 125 =
  32. 32.15 × 36 =
  33. 33.12 × 45 =
  34. 34.10 × 15 =
  35. 35.25 × 40 =
  36. 36.22 × 75 =
  37. 37.15 × 6 =
  38. 38.34 × 35 =
  39. 39.24 × 15 =
  40. 40.75 × 36 =

Answer key

  1. 360
  2. 880
  3. 330
  4. 750
  5. 560
  6. 910
  7. 360
  8. 1540
  9. 350
  10. 4500
  11. 120
  12. 1800
  13. 2200
  14. 900
  15. 750
  16. 1200
  17. 210
  18. 210
  19. 2080
  20. 270
  21. 1200
  22. 900
  23. 880
  24. 1950
  25. 250
  26. 450
  27. 650
  28. 120
  29. 2850
  30. 2100
  31. 4500
  32. 540
  33. 540
  34. 150
  35. 1000
  36. 1650
  37. 90
  38. 1190
  39. 360
  40. 2700

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