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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 50 · 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. 1.125 × 26 =
  2. 2.55 × 40 =
  3. 3.45 × 38 =
  4. 4.36 × 125 =
  5. 5.55 × 38 =
  6. 6.15 × 10 =
  7. 7.22 × 35 =
  8. 8.36 × 15 =
  9. 9.40 × 65 =
  10. 10.125 × 22 =
  11. 11.35 × 22 =
  12. 12.24 × 25 =
  13. 13.34 × 45 =
  14. 14.12 × 25 =
  15. 15.65 × 24 =
  16. 16.10 × 55 =
  17. 17.30 × 45 =
  18. 18.45 × 24 =
  19. 19.55 × 34 =
  20. 20.14 × 55 =
  21. 21.24 × 45 =
  22. 22.30 × 25 =
  23. 23.75 × 40 =
  24. 24.75 × 26 =
  25. 25.38 × 35 =
  26. 26.55 × 20 =
  27. 27.34 × 15 =
  28. 28.25 × 34 =
  29. 29.25 × 22 =
  30. 30.24 × 25 =
  31. 31.38 × 35 =
  32. 32.45 × 6 =
  33. 33.65 × 8 =
  34. 34.36 × 35 =
  35. 35.15 × 6 =
  36. 36.15 × 32 =
  37. 37.75 × 16 =
  38. 38.14 × 15 =
  39. 39.45 × 32 =
  40. 40.45 × 36 =

Answer key

  1. 3250
  2. 2200
  3. 1710
  4. 4500
  5. 2090
  6. 150
  7. 770
  8. 540
  9. 2600
  10. 2750
  11. 770
  12. 600
  13. 1530
  14. 300
  15. 1560
  16. 550
  17. 1350
  18. 1080
  19. 1870
  20. 770
  21. 1080
  22. 750
  23. 3000
  24. 1950
  25. 1330
  26. 1100
  27. 510
  28. 850
  29. 550
  30. 600
  31. 1330
  32. 270
  33. 520
  34. 1260
  35. 90
  36. 480
  37. 1200
  38. 210
  39. 1440
  40. 1620

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