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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 553 · 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 × 25 =
  2. 2.30 × 15 =
  3. 3.25 × 30 =
  4. 4.75 × 26 =
  5. 5.34 × 25 =
  6. 6.26 × 55 =
  7. 7.25 × 22 =
  8. 8.75 × 40 =
  9. 9.20 × 25 =
  10. 10.35 × 8 =
  11. 11.34 × 125 =
  12. 12.12 × 35 =
  13. 13.6 × 25 =
  14. 14.15 × 38 =
  15. 15.36 × 125 =
  16. 16.28 × 75 =
  17. 17.12 × 15 =
  18. 18.75 × 36 =
  19. 19.34 × 35 =
  20. 20.75 × 38 =
  21. 21.15 × 6 =
  22. 22.35 × 24 =
  23. 23.75 × 40 =
  24. 24.40 × 15 =
  25. 25.15 × 32 =
  26. 26.55 × 34 =
  27. 27.16 × 15 =
  28. 28.18 × 75 =
  29. 29.65 × 12 =
  30. 30.24 × 15 =
  31. 31.35 × 10 =
  32. 32.24 × 125 =
  33. 33.35 × 22 =
  34. 34.65 × 34 =
  35. 35.125 × 40 =
  36. 36.14 × 25 =
  37. 37.55 × 12 =
  38. 38.75 × 18 =
  39. 39.45 × 26 =
  40. 40.6 × 75 =

Answer key

  1. 250
  2. 450
  3. 750
  4. 1950
  5. 850
  6. 1430
  7. 550
  8. 3000
  9. 500
  10. 280
  11. 4250
  12. 420
  13. 150
  14. 570
  15. 4500
  16. 2100
  17. 180
  18. 2700
  19. 1190
  20. 2850
  21. 90
  22. 840
  23. 3000
  24. 600
  25. 480
  26. 1870
  27. 240
  28. 1350
  29. 780
  30. 360
  31. 350
  32. 3000
  33. 770
  34. 2210
  35. 5000
  36. 350
  37. 660
  38. 1350
  39. 1170
  40. 450

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