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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 872 · 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. 1.25 × 10 =
  2. 2.65 × 34 =
  3. 3.15 × 26 =
  4. 4.65 × 26 =
  5. 5.25 × 28 =
  6. 6.75 × 24 =
  7. 7.75 × 24 =
  8. 8.6 × 55 =
  9. 9.35 × 36 =
  10. 10.25 × 24 =
  11. 11.45 × 16 =
  12. 12.28 × 35 =
  13. 13.75 × 28 =
  14. 14.16 × 15 =
  15. 15.26 × 75 =
  16. 16.34 × 125 =
  17. 17.45 × 34 =
  18. 18.20 × 35 =
  19. 19.38 × 45 =
  20. 20.45 × 26 =
  21. 21.35 × 26 =
  22. 22.15 × 16 =
  23. 23.35 × 16 =
  24. 24.32 × 125 =
  25. 25.10 × 45 =
  26. 26.18 × 45 =
  27. 27.18 × 35 =
  28. 28.12 × 35 =
  29. 29.35 × 14 =
  30. 30.18 × 25 =
  31. 31.35 × 22 =
  32. 32.125 × 10 =
  33. 33.22 × 125 =
  34. 34.15 × 20 =
  35. 35.45 × 38 =
  36. 36.30 × 125 =
  37. 37.125 × 26 =
  38. 38.35 × 8 =
  39. 39.15 × 22 =
  40. 40.34 × 55 =

Answer key

  1. 250
  2. 2210
  3. 390
  4. 1690
  5. 700
  6. 1800
  7. 1800
  8. 330
  9. 1260
  10. 600
  11. 720
  12. 980
  13. 2100
  14. 240
  15. 1950
  16. 4250
  17. 1530
  18. 700
  19. 1710
  20. 1170
  21. 910
  22. 240
  23. 560
  24. 4000
  25. 450
  26. 810
  27. 630
  28. 420
  29. 490
  30. 450
  31. 770
  32. 1250
  33. 2750
  34. 300
  35. 1710
  36. 3750
  37. 3250
  38. 280
  39. 330
  40. 1870

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