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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 514 · 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. 1.75 × 12 =
  2. 2.75 × 22 =
  3. 3.14 × 45 =
  4. 4.25 × 14 =
  5. 5.35 × 30 =
  6. 6.35 × 24 =
  7. 7.15 × 30 =
  8. 8.55 × 30 =
  9. 9.35 × 16 =
  10. 10.55 × 32 =
  11. 11.8 × 15 =
  12. 12.10 × 55 =
  13. 13.40 × 25 =
  14. 14.35 × 18 =
  15. 15.45 × 32 =
  16. 16.65 × 6 =
  17. 17.38 × 75 =
  18. 18.24 × 125 =
  19. 19.15 × 24 =
  20. 20.55 × 16 =
  21. 21.6 × 75 =
  22. 22.15 × 10 =
  23. 23.45 × 6 =
  24. 24.16 × 45 =
  25. 25.65 × 36 =
  26. 26.32 × 125 =
  27. 27.10 × 25 =
  28. 28.25 × 6 =
  29. 29.45 × 14 =
  30. 30.8 × 75 =
  31. 31.75 × 36 =
  32. 32.65 × 32 =
  33. 33.15 × 22 =
  34. 34.35 × 22 =
  35. 35.26 × 45 =
  36. 36.45 × 8 =
  37. 37.38 × 35 =
  38. 38.16 × 25 =
  39. 39.75 × 38 =
  40. 40.55 × 38 =

Answer key

  1. 900
  2. 1650
  3. 630
  4. 350
  5. 1050
  6. 840
  7. 450
  8. 1650
  9. 560
  10. 1760
  11. 120
  12. 550
  13. 1000
  14. 630
  15. 1440
  16. 390
  17. 2850
  18. 3000
  19. 360
  20. 880
  21. 450
  22. 150
  23. 270
  24. 720
  25. 2340
  26. 4000
  27. 250
  28. 150
  29. 630
  30. 600
  31. 2700
  32. 2080
  33. 330
  34. 770
  35. 1170
  36. 360
  37. 1330
  38. 400
  39. 2850
  40. 2090

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