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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 986 · 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 × 55 =
  2. 2.25 × 28 =
  3. 3.35 × 10 =
  4. 4.45 × 8 =
  5. 5.35 × 18 =
  6. 6.65 × 10 =
  7. 7.25 × 20 =
  8. 8.15 × 20 =
  9. 9.38 × 55 =
  10. 10.125 × 34 =
  11. 11.36 × 15 =
  12. 12.75 × 8 =
  13. 13.15 × 26 =
  14. 14.35 × 8 =
  15. 15.125 × 34 =
  16. 16.24 × 15 =
  17. 17.6 × 25 =
  18. 18.45 × 10 =
  19. 19.25 × 16 =
  20. 20.22 × 25 =
  21. 21.30 × 55 =
  22. 22.35 × 22 =
  23. 23.15 × 20 =
  24. 24.36 × 15 =
  25. 25.45 × 36 =
  26. 26.12 × 15 =
  27. 27.35 × 18 =
  28. 28.15 × 20 =
  29. 29.125 × 40 =
  30. 30.35 × 34 =
  31. 31.25 × 34 =
  32. 32.10 × 125 =
  33. 33.125 × 8 =
  34. 34.28 × 35 =
  35. 35.16 × 45 =
  36. 36.36 × 25 =
  37. 37.125 × 30 =
  38. 38.22 × 15 =
  39. 39.15 × 10 =
  40. 40.34 × 15 =

Answer key

  1. 1210
  2. 700
  3. 350
  4. 360
  5. 630
  6. 650
  7. 500
  8. 300
  9. 2090
  10. 4250
  11. 540
  12. 600
  13. 390
  14. 280
  15. 4250
  16. 360
  17. 150
  18. 450
  19. 400
  20. 550
  21. 1650
  22. 770
  23. 300
  24. 540
  25. 1620
  26. 180
  27. 630
  28. 300
  29. 5000
  30. 1190
  31. 850
  32. 1250
  33. 1000
  34. 980
  35. 720
  36. 900
  37. 3750
  38. 330
  39. 150
  40. 510

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