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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 992 · 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. 1.32 × 45 =
  2. 2.28 × 125 =
  3. 3.15 × 6 =
  4. 4.14 × 65 =
  5. 5.40 × 25 =
  6. 6.25 × 22 =
  7. 7.65 × 26 =
  8. 8.25 × 12 =
  9. 9.36 × 55 =
  10. 10.45 × 18 =
  11. 11.35 × 36 =
  12. 12.15 × 20 =
  13. 13.25 × 40 =
  14. 14.20 × 55 =
  15. 15.65 × 20 =
  16. 16.125 × 30 =
  17. 17.45 × 14 =
  18. 18.16 × 15 =
  19. 19.65 × 10 =
  20. 20.26 × 65 =
  21. 21.30 × 45 =
  22. 22.6 × 125 =
  23. 23.45 × 26 =
  24. 24.24 × 125 =
  25. 25.75 × 36 =
  26. 26.38 × 125 =
  27. 27.25 × 34 =
  28. 28.8 × 45 =
  29. 29.12 × 25 =
  30. 30.45 × 36 =
  31. 31.18 × 15 =
  32. 32.35 × 14 =
  33. 33.22 × 35 =
  34. 34.45 × 26 =
  35. 35.28 × 55 =
  36. 36.65 × 20 =
  37. 37.40 × 75 =
  38. 38.65 × 36 =
  39. 39.16 × 75 =
  40. 40.25 × 14 =

Answer key

  1. 1440
  2. 3500
  3. 90
  4. 910
  5. 1000
  6. 550
  7. 1690
  8. 300
  9. 1980
  10. 810
  11. 1260
  12. 300
  13. 1000
  14. 1100
  15. 1300
  16. 3750
  17. 630
  18. 240
  19. 650
  20. 1690
  21. 1350
  22. 750
  23. 1170
  24. 3000
  25. 2700
  26. 4750
  27. 850
  28. 360
  29. 300
  30. 1620
  31. 270
  32. 490
  33. 770
  34. 1170
  35. 1540
  36. 1300
  37. 3000
  38. 2340
  39. 1200
  40. 350

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