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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 363 · 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. 1.28 × 55 =
  2. 2.8 × 125 =
  3. 3.65 × 36 =
  4. 4.25 × 28 =
  5. 5.15 × 20 =
  6. 6.16 × 125 =
  7. 7.30 × 125 =
  8. 8.40 × 35 =
  9. 9.32 × 35 =
  10. 10.75 × 30 =
  11. 11.26 × 15 =
  12. 12.28 × 55 =
  13. 13.24 × 15 =
  14. 14.35 × 10 =
  15. 15.32 × 55 =
  16. 16.24 × 55 =
  17. 17.32 × 65 =
  18. 18.65 × 28 =
  19. 19.10 × 35 =
  20. 20.45 × 32 =
  21. 21.18 × 35 =
  22. 22.40 × 25 =
  23. 23.18 × 45 =
  24. 24.55 × 16 =
  25. 25.26 × 15 =
  26. 26.20 × 35 =
  27. 27.15 × 16 =
  28. 28.24 × 45 =
  29. 29.14 × 35 =
  30. 30.30 × 55 =
  31. 31.24 × 75 =
  32. 32.25 × 20 =
  33. 33.55 × 32 =
  34. 34.8 × 75 =
  35. 35.14 × 65 =
  36. 36.75 × 6 =
  37. 37.12 × 55 =
  38. 38.25 × 12 =
  39. 39.8 × 45 =
  40. 40.16 × 75 =

Answer key

  1. 1540
  2. 1000
  3. 2340
  4. 700
  5. 300
  6. 2000
  7. 3750
  8. 1400
  9. 1120
  10. 2250
  11. 390
  12. 1540
  13. 360
  14. 350
  15. 1760
  16. 1320
  17. 2080
  18. 1820
  19. 350
  20. 1440
  21. 630
  22. 1000
  23. 810
  24. 880
  25. 390
  26. 700
  27. 240
  28. 1080
  29. 490
  30. 1650
  31. 1800
  32. 500
  33. 1760
  34. 600
  35. 910
  36. 450
  37. 660
  38. 300
  39. 360
  40. 1200

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