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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 299 · 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. 1.35 × 36 =
  2. 2.35 × 16 =
  3. 3.75 × 6 =
  4. 4.35 × 40 =
  5. 5.55 × 38 =
  6. 6.75 × 14 =
  7. 7.10 × 35 =
  8. 8.75 × 38 =
  9. 9.15 × 10 =
  10. 10.26 × 25 =
  11. 11.20 × 75 =
  12. 12.75 × 16 =
  13. 13.35 × 14 =
  14. 14.125 × 40 =
  15. 15.15 × 22 =
  16. 16.40 × 15 =
  17. 17.125 × 22 =
  18. 18.38 × 65 =
  19. 19.45 × 40 =
  20. 20.25 × 34 =
  21. 21.35 × 6 =
  22. 22.26 × 45 =
  23. 23.125 × 16 =
  24. 24.8 × 125 =
  25. 25.32 × 35 =
  26. 26.6 × 35 =
  27. 27.125 × 12 =
  28. 28.35 × 8 =
  29. 29.10 × 45 =
  30. 30.45 × 6 =
  31. 31.45 × 22 =
  32. 32.8 × 35 =
  33. 33.45 × 38 =
  34. 34.32 × 15 =
  35. 35.32 × 55 =
  36. 36.38 × 25 =
  37. 37.125 × 6 =
  38. 38.24 × 55 =
  39. 39.12 × 25 =
  40. 40.45 × 40 =

Answer key

  1. 1260
  2. 560
  3. 450
  4. 1400
  5. 2090
  6. 1050
  7. 350
  8. 2850
  9. 150
  10. 650
  11. 1500
  12. 1200
  13. 490
  14. 5000
  15. 330
  16. 600
  17. 2750
  18. 2470
  19. 1800
  20. 850
  21. 210
  22. 1170
  23. 2000
  24. 1000
  25. 1120
  26. 210
  27. 1500
  28. 280
  29. 450
  30. 270
  31. 990
  32. 280
  33. 1710
  34. 480
  35. 1760
  36. 950
  37. 750
  38. 1320
  39. 300
  40. 1800

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