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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 187 · 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. 1.45 × 30 =
  2. 2.55 × 14 =
  3. 3.125 × 18 =
  4. 4.36 × 45 =
  5. 5.45 × 20 =
  6. 6.38 × 65 =
  7. 7.24 × 65 =
  8. 8.40 × 125 =
  9. 9.75 × 30 =
  10. 10.45 × 40 =
  11. 11.55 × 38 =
  12. 12.22 × 15 =
  13. 13.45 × 32 =
  14. 14.15 × 14 =
  15. 15.35 × 34 =
  16. 16.65 × 40 =
  17. 17.30 × 25 =
  18. 18.8 × 25 =
  19. 19.24 × 35 =
  20. 20.30 × 65 =
  21. 21.24 × 65 =
  22. 22.45 × 6 =
  23. 23.75 × 8 =
  24. 24.28 × 25 =
  25. 25.8 × 125 =
  26. 26.45 × 32 =
  27. 27.12 × 75 =
  28. 28.125 × 16 =
  29. 29.8 × 15 =
  30. 30.15 × 18 =
  31. 31.25 × 6 =
  32. 32.25 × 34 =
  33. 33.10 × 15 =
  34. 34.36 × 45 =
  35. 35.16 × 125 =
  36. 36.65 × 20 =
  37. 37.26 × 15 =
  38. 38.6 × 55 =
  39. 39.45 × 20 =
  40. 40.125 × 32 =

Answer key

  1. 1350
  2. 770
  3. 2250
  4. 1620
  5. 900
  6. 2470
  7. 1560
  8. 5000
  9. 2250
  10. 1800
  11. 2090
  12. 330
  13. 1440
  14. 210
  15. 1190
  16. 2600
  17. 750
  18. 200
  19. 840
  20. 1950
  21. 1560
  22. 270
  23. 600
  24. 700
  25. 1000
  26. 1440
  27. 900
  28. 2000
  29. 120
  30. 270
  31. 150
  32. 850
  33. 150
  34. 1620
  35. 2000
  36. 1300
  37. 390
  38. 330
  39. 900
  40. 4000

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