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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 926 · 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. 1.24 × 15 =
  2. 2.75 × 12 =
  3. 3.25 × 16 =
  4. 4.20 × 35 =
  5. 5.75 × 8 =
  6. 6.14 × 45 =
  7. 7.15 × 6 =
  8. 8.16 × 25 =
  9. 9.125 × 38 =
  10. 10.55 × 30 =
  11. 11.38 × 65 =
  12. 12.22 × 45 =
  13. 13.35 × 12 =
  14. 14.36 × 75 =
  15. 15.14 × 45 =
  16. 16.18 × 45 =
  17. 17.55 × 16 =
  18. 18.65 × 6 =
  19. 19.35 × 12 =
  20. 20.14 × 35 =
  21. 21.8 × 15 =
  22. 22.65 × 30 =
  23. 23.15 × 14 =
  24. 24.125 × 18 =
  25. 25.15 × 20 =
  26. 26.16 × 25 =
  27. 27.38 × 75 =
  28. 28.125 × 8 =
  29. 29.125 × 28 =
  30. 30.24 × 125 =
  31. 31.6 × 35 =
  32. 32.25 × 14 =
  33. 33.32 × 55 =
  34. 34.26 × 35 =
  35. 35.26 × 55 =
  36. 36.36 × 45 =
  37. 37.45 × 40 =
  38. 38.35 × 14 =
  39. 39.15 × 22 =
  40. 40.18 × 35 =

Answer key

  1. 360
  2. 900
  3. 400
  4. 700
  5. 600
  6. 630
  7. 90
  8. 400
  9. 4750
  10. 1650
  11. 2470
  12. 990
  13. 420
  14. 2700
  15. 630
  16. 810
  17. 880
  18. 390
  19. 420
  20. 490
  21. 120
  22. 1950
  23. 210
  24. 2250
  25. 300
  26. 400
  27. 2850
  28. 1000
  29. 3500
  30. 3000
  31. 210
  32. 350
  33. 1760
  34. 910
  35. 1430
  36. 1620
  37. 1800
  38. 490
  39. 330
  40. 630

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