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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 502 · 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 × 8 =
  2. 2.55 × 6 =
  3. 3.65 × 28 =
  4. 4.45 × 40 =
  5. 5.16 × 35 =
  6. 6.65 × 32 =
  7. 7.75 × 16 =
  8. 8.65 × 18 =
  9. 9.16 × 45 =
  10. 10.55 × 18 =
  11. 11.75 × 12 =
  12. 12.65 × 38 =
  13. 13.125 × 8 =
  14. 14.22 × 45 =
  15. 15.15 × 40 =
  16. 16.12 × 25 =
  17. 17.8 × 15 =
  18. 18.75 × 6 =
  19. 19.55 × 6 =
  20. 20.25 × 18 =
  21. 21.35 × 18 =
  22. 22.55 × 18 =
  23. 23.6 × 15 =
  24. 24.22 × 25 =
  25. 25.35 × 8 =
  26. 26.12 × 65 =
  27. 27.35 × 28 =
  28. 28.34 × 55 =
  29. 29.15 × 28 =
  30. 30.45 × 26 =
  31. 31.125 × 16 =
  32. 32.8 × 45 =
  33. 33.22 × 15 =
  34. 34.75 × 32 =
  35. 35.26 × 35 =
  36. 36.65 × 14 =
  37. 37.75 × 16 =
  38. 38.12 × 35 =
  39. 39.28 × 45 =
  40. 40.75 × 28 =

Answer key

  1. 520
  2. 330
  3. 1820
  4. 1800
  5. 560
  6. 2080
  7. 1200
  8. 1170
  9. 720
  10. 990
  11. 900
  12. 2470
  13. 1000
  14. 990
  15. 600
  16. 300
  17. 120
  18. 450
  19. 330
  20. 450
  21. 630
  22. 990
  23. 90
  24. 550
  25. 280
  26. 780
  27. 980
  28. 1870
  29. 420
  30. 1170
  31. 2000
  32. 360
  33. 330
  34. 2400
  35. 910
  36. 910
  37. 1200
  38. 420
  39. 1260
  40. 2100

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