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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 955 · 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. 1.75 × 22 =
  2. 2.28 × 25 =
  3. 3.15 × 30 =
  4. 4.40 × 35 =
  5. 5.18 × 25 =
  6. 6.35 × 28 =
  7. 7.24 × 35 =
  8. 8.25 × 8 =
  9. 9.35 × 34 =
  10. 10.20 × 35 =
  11. 11.55 × 30 =
  12. 12.12 × 15 =
  13. 13.26 × 35 =
  14. 14.34 × 125 =
  15. 15.30 × 35 =
  16. 16.12 × 15 =
  17. 17.35 × 16 =
  18. 18.55 × 12 =
  19. 19.25 × 8 =
  20. 20.75 × 10 =
  21. 21.18 × 75 =
  22. 22.75 × 14 =
  23. 23.25 × 12 =
  24. 24.10 × 15 =
  25. 25.45 × 34 =
  26. 26.16 × 25 =
  27. 27.6 × 75 =
  28. 28.16 × 25 =
  29. 29.38 × 65 =
  30. 30.20 × 35 =
  31. 31.10 × 65 =
  32. 32.55 × 36 =
  33. 33.15 × 20 =
  34. 34.28 × 35 =
  35. 35.125 × 40 =
  36. 36.65 × 6 =
  37. 37.25 × 20 =
  38. 38.15 × 8 =
  39. 39.125 × 28 =
  40. 40.32 × 15 =

Answer key

  1. 1650
  2. 700
  3. 450
  4. 1400
  5. 450
  6. 980
  7. 840
  8. 200
  9. 1190
  10. 700
  11. 1650
  12. 180
  13. 910
  14. 4250
  15. 1050
  16. 180
  17. 560
  18. 660
  19. 200
  20. 750
  21. 1350
  22. 1050
  23. 300
  24. 150
  25. 1530
  26. 400
  27. 450
  28. 400
  29. 2470
  30. 700
  31. 650
  32. 1980
  33. 300
  34. 980
  35. 5000
  36. 390
  37. 500
  38. 120
  39. 3500
  40. 480

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