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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 235 · 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. 1.35 × 38 =
  2. 2.8 × 45 =
  3. 3.25 × 12 =
  4. 4.16 × 25 =
  5. 5.65 × 36 =
  6. 6.36 × 15 =
  7. 7.45 × 24 =
  8. 8.16 × 75 =
  9. 9.10 × 55 =
  10. 10.15 × 22 =
  11. 11.75 × 8 =
  12. 12.16 × 125 =
  13. 13.65 × 28 =
  14. 14.30 × 75 =
  15. 15.125 × 32 =
  16. 16.16 × 25 =
  17. 17.16 × 125 =
  18. 18.15 × 32 =
  19. 19.45 × 12 =
  20. 20.14 × 45 =
  21. 21.15 × 6 =
  22. 22.125 × 10 =
  23. 23.35 × 36 =
  24. 24.75 × 12 =
  25. 25.40 × 45 =
  26. 26.6 × 25 =
  27. 27.45 × 24 =
  28. 28.34 × 55 =
  29. 29.65 × 24 =
  30. 30.65 × 16 =
  31. 31.30 × 125 =
  32. 32.30 × 25 =
  33. 33.40 × 35 =
  34. 34.65 × 16 =
  35. 35.125 × 34 =
  36. 36.6 × 45 =
  37. 37.34 × 55 =
  38. 38.34 × 45 =
  39. 39.40 × 125 =
  40. 40.55 × 10 =

Answer key

  1. 1330
  2. 360
  3. 300
  4. 400
  5. 2340
  6. 540
  7. 1080
  8. 1200
  9. 550
  10. 330
  11. 600
  12. 2000
  13. 1820
  14. 2250
  15. 4000
  16. 400
  17. 2000
  18. 480
  19. 540
  20. 630
  21. 90
  22. 1250
  23. 1260
  24. 900
  25. 1800
  26. 150
  27. 1080
  28. 1870
  29. 1560
  30. 1040
  31. 3750
  32. 750
  33. 1400
  34. 1040
  35. 4250
  36. 270
  37. 1870
  38. 1530
  39. 5000
  40. 550

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