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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 828 · 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. 1.24 × 55 =
  2. 2.22 × 35 =
  3. 3.22 × 15 =
  4. 4.10 × 65 =
  5. 5.15 × 12 =
  6. 6.15 × 34 =
  7. 7.35 × 20 =
  8. 8.28 × 45 =
  9. 9.34 × 35 =
  10. 10.75 × 10 =
  11. 11.45 × 26 =
  12. 12.125 × 32 =
  13. 13.8 × 45 =
  14. 14.26 × 65 =
  15. 15.32 × 125 =
  16. 16.22 × 45 =
  17. 17.35 × 22 =
  18. 18.14 × 65 =
  19. 19.24 × 75 =
  20. 20.65 × 24 =
  21. 21.75 × 40 =
  22. 22.12 × 65 =
  23. 23.8 × 75 =
  24. 24.16 × 75 =
  25. 25.75 × 18 =
  26. 26.14 × 55 =
  27. 27.20 × 45 =
  28. 28.8 × 15 =
  29. 29.22 × 15 =
  30. 30.26 × 75 =
  31. 31.20 × 15 =
  32. 32.75 × 12 =
  33. 33.45 × 32 =
  34. 34.22 × 45 =
  35. 35.55 × 12 =
  36. 36.14 × 25 =
  37. 37.40 × 65 =
  38. 38.35 × 12 =
  39. 39.65 × 14 =
  40. 40.75 × 40 =

Answer key

  1. 1320
  2. 770
  3. 330
  4. 650
  5. 180
  6. 510
  7. 700
  8. 1260
  9. 1190
  10. 750
  11. 1170
  12. 4000
  13. 360
  14. 1690
  15. 4000
  16. 990
  17. 770
  18. 910
  19. 1800
  20. 1560
  21. 3000
  22. 780
  23. 600
  24. 1200
  25. 1350
  26. 770
  27. 900
  28. 120
  29. 330
  30. 1950
  31. 300
  32. 900
  33. 1440
  34. 990
  35. 660
  36. 350
  37. 2600
  38. 420
  39. 910
  40. 3000

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