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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 678 · 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. 1.12 × 45 =
  2. 2.40 × 25 =
  3. 3.35 × 38 =
  4. 4.25 × 12 =
  5. 5.8 × 65 =
  6. 6.65 × 32 =
  7. 7.24 × 45 =
  8. 8.55 × 16 =
  9. 9.14 × 45 =
  10. 10.75 × 36 =
  11. 11.18 × 55 =
  12. 12.15 × 8 =
  13. 13.16 × 15 =
  14. 14.65 × 30 =
  15. 15.45 × 16 =
  16. 16.24 × 125 =
  17. 17.25 × 10 =
  18. 18.34 × 55 =
  19. 19.55 × 18 =
  20. 20.125 × 12 =
  21. 21.75 × 10 =
  22. 22.55 × 14 =
  23. 23.125 × 32 =
  24. 24.18 × 35 =
  25. 25.36 × 45 =
  26. 26.35 × 30 =
  27. 27.35 × 38 =
  28. 28.8 × 75 =
  29. 29.35 × 28 =
  30. 30.75 × 26 =
  31. 31.35 × 28 =
  32. 32.35 × 26 =
  33. 33.32 × 55 =
  34. 34.15 × 22 =
  35. 35.65 × 28 =
  36. 36.75 × 18 =
  37. 37.40 × 45 =
  38. 38.6 × 35 =
  39. 39.10 × 65 =
  40. 40.32 × 75 =

Answer key

  1. 540
  2. 1000
  3. 1330
  4. 300
  5. 520
  6. 2080
  7. 1080
  8. 880
  9. 630
  10. 2700
  11. 990
  12. 120
  13. 240
  14. 1950
  15. 720
  16. 3000
  17. 250
  18. 1870
  19. 990
  20. 1500
  21. 750
  22. 770
  23. 4000
  24. 630
  25. 1620
  26. 1050
  27. 1330
  28. 600
  29. 980
  30. 1950
  31. 980
  32. 910
  33. 1760
  34. 330
  35. 1820
  36. 1350
  37. 1800
  38. 210
  39. 650
  40. 2400

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