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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 338 · 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. 1.10 × 35 =
  2. 2.75 × 36 =
  3. 3.45 × 8 =
  4. 4.16 × 35 =
  5. 5.10 × 45 =
  6. 6.55 × 38 =
  7. 7.65 × 40 =
  8. 8.8 × 35 =
  9. 9.25 × 30 =
  10. 10.25 × 20 =
  11. 11.35 × 8 =
  12. 12.15 × 30 =
  13. 13.22 × 15 =
  14. 14.25 × 6 =
  15. 15.125 × 26 =
  16. 16.45 × 8 =
  17. 17.25 × 32 =
  18. 18.6 × 25 =
  19. 19.25 × 32 =
  20. 20.45 × 24 =
  21. 21.30 × 25 =
  22. 22.34 × 45 =
  23. 23.32 × 125 =
  24. 24.24 × 125 =
  25. 25.65 × 34 =
  26. 26.24 × 25 =
  27. 27.36 × 65 =
  28. 28.22 × 55 =
  29. 29.75 × 18 =
  30. 30.15 × 16 =
  31. 31.8 × 45 =
  32. 32.65 × 40 =
  33. 33.16 × 35 =
  34. 34.125 × 8 =
  35. 35.6 × 55 =
  36. 36.55 × 12 =
  37. 37.30 × 45 =
  38. 38.65 × 26 =
  39. 39.38 × 65 =
  40. 40.16 × 125 =

Answer key

  1. 350
  2. 2700
  3. 360
  4. 560
  5. 450
  6. 2090
  7. 2600
  8. 280
  9. 750
  10. 500
  11. 280
  12. 450
  13. 330
  14. 150
  15. 3250
  16. 360
  17. 800
  18. 150
  19. 800
  20. 1080
  21. 750
  22. 1530
  23. 4000
  24. 3000
  25. 2210
  26. 600
  27. 2340
  28. 1210
  29. 1350
  30. 240
  31. 360
  32. 2600
  33. 560
  34. 1000
  35. 330
  36. 660
  37. 1350
  38. 1690
  39. 2470
  40. 2000

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