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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 932 · 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. 1.8 × 75 =
  2. 2.12 × 125 =
  3. 3.75 × 34 =
  4. 4.15 × 8 =
  5. 5.25 × 26 =
  6. 6.125 × 40 =
  7. 7.14 × 65 =
  8. 8.25 × 14 =
  9. 9.45 × 28 =
  10. 10.25 × 16 =
  11. 11.24 × 65 =
  12. 12.45 × 22 =
  13. 13.25 × 28 =
  14. 14.65 × 20 =
  15. 15.75 × 36 =
  16. 16.125 × 14 =
  17. 17.125 × 8 =
  18. 18.18 × 15 =
  19. 19.8 × 75 =
  20. 20.25 × 16 =
  21. 21.15 × 36 =
  22. 22.6 × 75 =
  23. 23.65 × 40 =
  24. 24.34 × 35 =
  25. 25.45 × 14 =
  26. 26.35 × 34 =
  27. 27.20 × 75 =
  28. 28.35 × 24 =
  29. 29.30 × 55 =
  30. 30.35 × 10 =
  31. 31.34 × 25 =
  32. 32.65 × 30 =
  33. 33.18 × 65 =
  34. 34.35 × 6 =
  35. 35.55 × 12 =
  36. 36.15 × 14 =
  37. 37.25 × 20 =
  38. 38.14 × 75 =
  39. 39.26 × 125 =
  40. 40.125 × 20 =

Answer key

  1. 600
  2. 1500
  3. 2550
  4. 120
  5. 650
  6. 5000
  7. 910
  8. 350
  9. 1260
  10. 400
  11. 1560
  12. 990
  13. 700
  14. 1300
  15. 2700
  16. 1750
  17. 1000
  18. 270
  19. 600
  20. 400
  21. 540
  22. 450
  23. 2600
  24. 1190
  25. 630
  26. 1190
  27. 1500
  28. 840
  29. 1650
  30. 350
  31. 850
  32. 1950
  33. 1170
  34. 210
  35. 660
  36. 210
  37. 500
  38. 1050
  39. 3250
  40. 2500

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