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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 973 · 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 × 35 =
  2. 2.32 × 55 =
  3. 3.40 × 125 =
  4. 4.40 × 25 =
  5. 5.8 × 125 =
  6. 6.35 × 14 =
  7. 7.34 × 55 =
  8. 8.75 × 18 =
  9. 9.65 × 6 =
  10. 10.14 × 25 =
  11. 11.15 × 14 =
  12. 12.36 × 15 =
  13. 13.45 × 18 =
  14. 14.20 × 125 =
  15. 15.125 × 14 =
  16. 16.15 × 12 =
  17. 17.26 × 25 =
  18. 18.65 × 14 =
  19. 19.38 × 75 =
  20. 20.32 × 25 =
  21. 21.14 × 125 =
  22. 22.20 × 35 =
  23. 23.22 × 35 =
  24. 24.35 × 22 =
  25. 25.20 × 65 =
  26. 26.15 × 16 =
  27. 27.12 × 55 =
  28. 28.10 × 25 =
  29. 29.40 × 25 =
  30. 30.26 × 25 =
  31. 31.26 × 15 =
  32. 32.14 × 55 =
  33. 33.10 × 125 =
  34. 34.38 × 75 =
  35. 35.6 × 25 =
  36. 36.30 × 25 =
  37. 37.40 × 125 =
  38. 38.55 × 12 =
  39. 39.65 × 14 =
  40. 40.45 × 28 =

Answer key

  1. 280
  2. 1760
  3. 5000
  4. 1000
  5. 1000
  6. 490
  7. 1870
  8. 1350
  9. 390
  10. 350
  11. 210
  12. 540
  13. 810
  14. 2500
  15. 1750
  16. 180
  17. 650
  18. 910
  19. 2850
  20. 800
  21. 1750
  22. 700
  23. 770
  24. 770
  25. 1300
  26. 240
  27. 660
  28. 250
  29. 1000
  30. 650
  31. 390
  32. 770
  33. 1250
  34. 2850
  35. 150
  36. 750
  37. 5000
  38. 660
  39. 910
  40. 1260

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