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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 411 · 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. 1.15 × 10 =
  2. 2.75 × 34 =
  3. 3.25 × 8 =
  4. 4.28 × 125 =
  5. 5.36 × 25 =
  6. 6.10 × 125 =
  7. 7.35 × 8 =
  8. 8.25 × 6 =
  9. 9.25 × 24 =
  10. 10.8 × 25 =
  11. 11.22 × 55 =
  12. 12.125 × 14 =
  13. 13.6 × 25 =
  14. 14.12 × 25 =
  15. 15.75 × 26 =
  16. 16.65 × 30 =
  17. 17.16 × 15 =
  18. 18.32 × 55 =
  19. 19.15 × 18 =
  20. 20.65 × 34 =
  21. 21.75 × 40 =
  22. 22.35 × 40 =
  23. 23.45 × 22 =
  24. 24.75 × 22 =
  25. 25.45 × 8 =
  26. 26.34 × 75 =
  27. 27.32 × 15 =
  28. 28.65 × 12 =
  29. 29.55 × 26 =
  30. 30.28 × 45 =
  31. 31.35 × 36 =
  32. 32.25 × 40 =
  33. 33.75 × 12 =
  34. 34.35 × 26 =
  35. 35.8 × 15 =
  36. 36.15 × 20 =
  37. 37.22 × 125 =
  38. 38.12 × 55 =
  39. 39.65 × 6 =
  40. 40.16 × 65 =

Answer key

  1. 150
  2. 2550
  3. 200
  4. 3500
  5. 900
  6. 1250
  7. 280
  8. 150
  9. 600
  10. 200
  11. 1210
  12. 1750
  13. 150
  14. 300
  15. 1950
  16. 1950
  17. 240
  18. 1760
  19. 270
  20. 2210
  21. 3000
  22. 1400
  23. 990
  24. 1650
  25. 360
  26. 2550
  27. 480
  28. 780
  29. 1430
  30. 1260
  31. 1260
  32. 1000
  33. 900
  34. 910
  35. 120
  36. 300
  37. 2750
  38. 660
  39. 390
  40. 1040

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