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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 919 · 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. 1.15 × 14 =
  2. 2.65 × 28 =
  3. 3.36 × 35 =
  4. 4.35 × 26 =
  5. 5.12 × 15 =
  6. 6.25 × 36 =
  7. 7.25 × 30 =
  8. 8.38 × 65 =
  9. 9.26 × 15 =
  10. 10.35 × 40 =
  11. 11.45 × 30 =
  12. 12.65 × 12 =
  13. 13.15 × 24 =
  14. 14.6 × 15 =
  15. 15.30 × 125 =
  16. 16.45 × 22 =
  17. 17.45 × 14 =
  18. 18.35 × 34 =
  19. 19.45 × 28 =
  20. 20.28 × 125 =
  21. 21.32 × 65 =
  22. 22.8 × 55 =
  23. 23.75 × 8 =
  24. 24.26 × 25 =
  25. 25.75 × 24 =
  26. 26.25 × 36 =
  27. 27.25 × 6 =
  28. 28.25 × 20 =
  29. 29.125 × 32 =
  30. 30.30 × 15 =
  31. 31.15 × 32 =
  32. 32.8 × 35 =
  33. 33.125 × 26 =
  34. 34.34 × 25 =
  35. 35.35 × 8 =
  36. 36.25 × 34 =
  37. 37.15 × 14 =
  38. 38.65 × 20 =
  39. 39.26 × 55 =
  40. 40.24 × 15 =

Answer key

  1. 210
  2. 1820
  3. 1260
  4. 910
  5. 180
  6. 900
  7. 750
  8. 2470
  9. 390
  10. 1400
  11. 1350
  12. 780
  13. 360
  14. 90
  15. 3750
  16. 990
  17. 630
  18. 1190
  19. 1260
  20. 3500
  21. 2080
  22. 440
  23. 600
  24. 650
  25. 1800
  26. 900
  27. 150
  28. 500
  29. 4000
  30. 450
  31. 480
  32. 280
  33. 3250
  34. 850
  35. 280
  36. 850
  37. 210
  38. 1300
  39. 1430
  40. 360

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