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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 870 · 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. 1.55 × 6 =
  2. 2.14 × 35 =
  3. 3.10 × 25 =
  4. 4.32 × 125 =
  5. 5.125 × 34 =
  6. 6.75 × 26 =
  7. 7.45 × 38 =
  8. 8.24 × 25 =
  9. 9.6 × 125 =
  10. 10.10 × 65 =
  11. 11.10 × 65 =
  12. 12.55 × 28 =
  13. 13.55 × 12 =
  14. 14.75 × 32 =
  15. 15.45 × 28 =
  16. 16.14 × 15 =
  17. 17.38 × 75 =
  18. 18.25 × 10 =
  19. 19.32 × 45 =
  20. 20.125 × 22 =
  21. 21.38 × 75 =
  22. 22.15 × 22 =
  23. 23.34 × 15 =
  24. 24.18 × 35 =
  25. 25.55 × 28 =
  26. 26.125 × 12 =
  27. 27.25 × 24 =
  28. 28.55 × 8 =
  29. 29.55 × 30 =
  30. 30.36 × 35 =
  31. 31.55 × 36 =
  32. 32.125 × 30 =
  33. 33.15 × 16 =
  34. 34.15 × 26 =
  35. 35.6 × 15 =
  36. 36.25 × 18 =
  37. 37.75 × 8 =
  38. 38.34 × 125 =
  39. 39.35 × 20 =
  40. 40.10 × 25 =

Answer key

  1. 330
  2. 490
  3. 250
  4. 4000
  5. 4250
  6. 1950
  7. 1710
  8. 600
  9. 750
  10. 650
  11. 650
  12. 1540
  13. 660
  14. 2400
  15. 1260
  16. 210
  17. 2850
  18. 250
  19. 1440
  20. 2750
  21. 2850
  22. 330
  23. 510
  24. 630
  25. 1540
  26. 1500
  27. 600
  28. 440
  29. 1650
  30. 1260
  31. 1980
  32. 3750
  33. 240
  34. 390
  35. 90
  36. 450
  37. 600
  38. 4250
  39. 700
  40. 250

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