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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 389 · 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. 1.65 × 10 =
  2. 2.14 × 15 =
  3. 3.30 × 45 =
  4. 4.55 × 8 =
  5. 5.25 × 12 =
  6. 6.40 × 65 =
  7. 7.26 × 25 =
  8. 8.28 × 25 =
  9. 9.8 × 45 =
  10. 10.34 × 25 =
  11. 11.75 × 38 =
  12. 12.35 × 36 =
  13. 13.18 × 55 =
  14. 14.28 × 65 =
  15. 15.22 × 45 =
  16. 16.36 × 75 =
  17. 17.45 × 26 =
  18. 18.55 × 34 =
  19. 19.6 × 75 =
  20. 20.65 × 6 =
  21. 21.20 × 125 =
  22. 22.26 × 25 =
  23. 23.15 × 32 =
  24. 24.25 × 16 =
  25. 25.75 × 14 =
  26. 26.65 × 10 =
  27. 27.125 × 14 =
  28. 28.65 × 6 =
  29. 29.35 × 34 =
  30. 30.15 × 12 =
  31. 31.36 × 55 =
  32. 32.12 × 75 =
  33. 33.15 × 28 =
  34. 34.125 × 14 =
  35. 35.6 × 75 =
  36. 36.75 × 6 =
  37. 37.75 × 28 =
  38. 38.35 × 14 =
  39. 39.12 × 75 =
  40. 40.12 × 25 =

Answer key

  1. 650
  2. 210
  3. 1350
  4. 440
  5. 300
  6. 2600
  7. 650
  8. 700
  9. 360
  10. 850
  11. 2850
  12. 1260
  13. 990
  14. 1820
  15. 990
  16. 2700
  17. 1170
  18. 1870
  19. 450
  20. 390
  21. 2500
  22. 650
  23. 480
  24. 400
  25. 1050
  26. 650
  27. 1750
  28. 390
  29. 1190
  30. 180
  31. 1980
  32. 900
  33. 420
  34. 1750
  35. 450
  36. 450
  37. 2100
  38. 490
  39. 900
  40. 300

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