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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 601 · 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. 1.40 × 75 =
  2. 2.125 × 38 =
  3. 3.30 × 35 =
  4. 4.34 × 25 =
  5. 5.8 × 125 =
  6. 6.25 × 18 =
  7. 7.26 × 25 =
  8. 8.12 × 35 =
  9. 9.28 × 35 =
  10. 10.55 × 30 =
  11. 11.55 × 20 =
  12. 12.45 × 22 =
  13. 13.55 × 22 =
  14. 14.26 × 45 =
  15. 15.18 × 25 =
  16. 16.75 × 32 =
  17. 17.14 × 15 =
  18. 18.15 × 6 =
  19. 19.15 × 30 =
  20. 20.36 × 65 =
  21. 21.8 × 75 =
  22. 22.30 × 25 =
  23. 23.25 × 40 =
  24. 24.10 × 25 =
  25. 25.75 × 36 =
  26. 26.125 × 38 =
  27. 27.75 × 20 =
  28. 28.125 × 22 =
  29. 29.8 × 15 =
  30. 30.35 × 34 =
  31. 31.6 × 25 =
  32. 32.15 × 10 =
  33. 33.32 × 125 =
  34. 34.35 × 26 =
  35. 35.45 × 38 =
  36. 36.25 × 24 =
  37. 37.36 × 35 =
  38. 38.75 × 8 =
  39. 39.22 × 125 =
  40. 40.18 × 125 =

Answer key

  1. 3000
  2. 4750
  3. 1050
  4. 850
  5. 1000
  6. 450
  7. 650
  8. 420
  9. 980
  10. 1650
  11. 1100
  12. 990
  13. 1210
  14. 1170
  15. 450
  16. 2400
  17. 210
  18. 90
  19. 450
  20. 2340
  21. 600
  22. 750
  23. 1000
  24. 250
  25. 2700
  26. 4750
  27. 1500
  28. 2750
  29. 120
  30. 1190
  31. 150
  32. 150
  33. 4000
  34. 910
  35. 1710
  36. 600
  37. 1260
  38. 600
  39. 2750
  40. 2250

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