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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 470 · 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 × 45 =
  2. 2.32 × 35 =
  3. 3.12 × 125 =
  4. 4.65 × 8 =
  5. 5.15 × 26 =
  6. 6.34 × 55 =
  7. 7.75 × 28 =
  8. 8.15 × 8 =
  9. 9.20 × 15 =
  10. 10.25 × 36 =
  11. 11.55 × 34 =
  12. 12.14 × 35 =
  13. 13.45 × 8 =
  14. 14.45 × 22 =
  15. 15.6 × 125 =
  16. 16.25 × 18 =
  17. 17.14 × 35 =
  18. 18.35 × 16 =
  19. 19.65 × 24 =
  20. 20.14 × 55 =
  21. 21.125 × 22 =
  22. 22.75 × 8 =
  23. 23.24 × 25 =
  24. 24.45 × 38 =
  25. 25.14 × 125 =
  26. 26.26 × 125 =
  27. 27.22 × 45 =
  28. 28.25 × 16 =
  29. 29.35 × 14 =
  30. 30.8 × 35 =
  31. 31.10 × 25 =
  32. 32.65 × 32 =
  33. 33.25 × 18 =
  34. 34.125 × 36 =
  35. 35.40 × 35 =
  36. 36.28 × 125 =
  37. 37.20 × 65 =
  38. 38.65 × 28 =
  39. 39.22 × 75 =
  40. 40.6 × 65 =

Answer key

  1. 450
  2. 1120
  3. 1500
  4. 520
  5. 390
  6. 1870
  7. 2100
  8. 120
  9. 300
  10. 900
  11. 1870
  12. 490
  13. 360
  14. 990
  15. 750
  16. 450
  17. 490
  18. 560
  19. 1560
  20. 770
  21. 2750
  22. 600
  23. 600
  24. 1710
  25. 1750
  26. 3250
  27. 990
  28. 400
  29. 490
  30. 280
  31. 250
  32. 2080
  33. 450
  34. 4500
  35. 1400
  36. 3500
  37. 1300
  38. 1820
  39. 1650
  40. 390

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