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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 718 · 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. 1.14 × 25 =
  2. 2.75 × 10 =
  3. 3.8 × 15 =
  4. 4.12 × 75 =
  5. 5.12 × 65 =
  6. 6.14 × 25 =
  7. 7.45 × 26 =
  8. 8.30 × 125 =
  9. 9.8 × 75 =
  10. 10.28 × 35 =
  11. 11.34 × 25 =
  12. 12.40 × 25 =
  13. 13.55 × 20 =
  14. 14.125 × 26 =
  15. 15.28 × 65 =
  16. 16.28 × 125 =
  17. 17.20 × 15 =
  18. 18.15 × 12 =
  19. 19.14 × 35 =
  20. 20.125 × 36 =
  21. 21.65 × 18 =
  22. 22.16 × 25 =
  23. 23.15 × 20 =
  24. 24.10 × 25 =
  25. 25.75 × 10 =
  26. 26.15 × 32 =
  27. 27.55 × 40 =
  28. 28.16 × 125 =
  29. 29.26 × 15 =
  30. 30.125 × 24 =
  31. 31.25 × 30 =
  32. 32.125 × 14 =
  33. 33.55 × 34 =
  34. 34.8 × 125 =
  35. 35.75 × 40 =
  36. 36.75 × 30 =
  37. 37.10 × 125 =
  38. 38.125 × 6 =
  39. 39.14 × 15 =
  40. 40.65 × 28 =

Answer key

  1. 350
  2. 750
  3. 120
  4. 900
  5. 780
  6. 350
  7. 1170
  8. 3750
  9. 600
  10. 980
  11. 850
  12. 1000
  13. 1100
  14. 3250
  15. 1820
  16. 3500
  17. 300
  18. 180
  19. 490
  20. 4500
  21. 1170
  22. 400
  23. 300
  24. 250
  25. 750
  26. 480
  27. 2200
  28. 2000
  29. 390
  30. 3000
  31. 750
  32. 1750
  33. 1870
  34. 1000
  35. 3000
  36. 2250
  37. 1250
  38. 750
  39. 210
  40. 1820

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