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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 339 · 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. 1.16 × 55 =
  2. 2.22 × 15 =
  3. 3.15 × 34 =
  4. 4.45 × 32 =
  5. 5.15 × 18 =
  6. 6.26 × 15 =
  7. 7.125 × 8 =
  8. 8.25 × 18 =
  9. 9.75 × 22 =
  10. 10.15 × 26 =
  11. 11.40 × 55 =
  12. 12.15 × 10 =
  13. 13.38 × 25 =
  14. 14.30 × 45 =
  15. 15.30 × 55 =
  16. 16.125 × 14 =
  17. 17.12 × 25 =
  18. 18.18 × 65 =
  19. 19.35 × 36 =
  20. 20.65 × 28 =
  21. 21.38 × 25 =
  22. 22.75 × 24 =
  23. 23.25 × 10 =
  24. 24.65 × 26 =
  25. 25.65 × 10 =
  26. 26.125 × 18 =
  27. 27.75 × 10 =
  28. 28.25 × 16 =
  29. 29.10 × 25 =
  30. 30.35 × 16 =
  31. 31.25 × 28 =
  32. 32.6 × 55 =
  33. 33.6 × 25 =
  34. 34.55 × 8 =
  35. 35.10 × 25 =
  36. 36.15 × 40 =
  37. 37.65 × 32 =
  38. 38.65 × 14 =
  39. 39.30 × 75 =
  40. 40.65 × 18 =

Answer key

  1. 880
  2. 330
  3. 510
  4. 1440
  5. 270
  6. 390
  7. 1000
  8. 450
  9. 1650
  10. 390
  11. 2200
  12. 150
  13. 950
  14. 1350
  15. 1650
  16. 1750
  17. 300
  18. 1170
  19. 1260
  20. 1820
  21. 950
  22. 1800
  23. 250
  24. 1690
  25. 650
  26. 2250
  27. 750
  28. 400
  29. 250
  30. 560
  31. 700
  32. 330
  33. 150
  34. 440
  35. 250
  36. 600
  37. 2080
  38. 910
  39. 2250
  40. 1170

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