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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 163 · 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. 1.55 × 20 =
  2. 2.26 × 55 =
  3. 3.26 × 45 =
  4. 4.8 × 25 =
  5. 5.25 × 16 =
  6. 6.65 × 24 =
  7. 7.36 × 35 =
  8. 8.25 × 8 =
  9. 9.15 × 10 =
  10. 10.15 × 18 =
  11. 11.32 × 35 =
  12. 12.125 × 24 =
  13. 13.26 × 125 =
  14. 14.30 × 35 =
  15. 15.24 × 25 =
  16. 16.65 × 14 =
  17. 17.15 × 10 =
  18. 18.75 × 28 =
  19. 19.55 × 16 =
  20. 20.32 × 55 =
  21. 21.28 × 45 =
  22. 22.125 × 16 =
  23. 23.25 × 32 =
  24. 24.30 × 35 =
  25. 25.14 × 15 =
  26. 26.32 × 65 =
  27. 27.8 × 125 =
  28. 28.125 × 12 =
  29. 29.75 × 26 =
  30. 30.15 × 34 =
  31. 31.55 × 14 =
  32. 32.45 × 34 =
  33. 33.55 × 30 =
  34. 34.14 × 65 =
  35. 35.8 × 35 =
  36. 36.10 × 65 =
  37. 37.25 × 12 =
  38. 38.15 × 28 =
  39. 39.65 × 24 =
  40. 40.20 × 45 =

Answer key

  1. 1100
  2. 1430
  3. 1170
  4. 200
  5. 400
  6. 1560
  7. 1260
  8. 200
  9. 150
  10. 270
  11. 1120
  12. 3000
  13. 3250
  14. 1050
  15. 600
  16. 910
  17. 150
  18. 2100
  19. 880
  20. 1760
  21. 1260
  22. 2000
  23. 800
  24. 1050
  25. 210
  26. 2080
  27. 1000
  28. 1500
  29. 1950
  30. 510
  31. 770
  32. 1530
  33. 1650
  34. 910
  35. 280
  36. 650
  37. 300
  38. 420
  39. 1560
  40. 900

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