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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 136 · 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. 1.75 × 12 =
  2. 2.40 × 45 =
  3. 3.28 × 65 =
  4. 4.18 × 15 =
  5. 5.35 × 20 =
  6. 6.75 × 30 =
  7. 7.22 × 25 =
  8. 8.20 × 55 =
  9. 9.35 × 32 =
  10. 10.6 × 35 =
  11. 11.65 × 26 =
  12. 12.25 × 32 =
  13. 13.25 × 12 =
  14. 14.75 × 32 =
  15. 15.45 × 12 =
  16. 16.15 × 38 =
  17. 17.36 × 125 =
  18. 18.65 × 10 =
  19. 19.25 × 28 =
  20. 20.20 × 55 =
  21. 21.65 × 12 =
  22. 22.26 × 25 =
  23. 23.6 × 35 =
  24. 24.35 × 10 =
  25. 25.26 × 75 =
  26. 26.16 × 15 =
  27. 27.6 × 15 =
  28. 28.30 × 55 =
  29. 29.32 × 75 =
  30. 30.75 × 26 =
  31. 31.15 × 6 =
  32. 32.28 × 35 =
  33. 33.35 × 16 =
  34. 34.40 × 125 =
  35. 35.75 × 12 =
  36. 36.34 × 25 =
  37. 37.34 × 65 =
  38. 38.16 × 45 =
  39. 39.35 × 6 =
  40. 40.28 × 35 =

Answer key

  1. 900
  2. 1800
  3. 1820
  4. 270
  5. 700
  6. 2250
  7. 550
  8. 1100
  9. 1120
  10. 210
  11. 1690
  12. 800
  13. 300
  14. 2400
  15. 540
  16. 570
  17. 4500
  18. 650
  19. 700
  20. 1100
  21. 780
  22. 650
  23. 210
  24. 350
  25. 1950
  26. 240
  27. 90
  28. 1650
  29. 2400
  30. 1950
  31. 90
  32. 980
  33. 560
  34. 5000
  35. 900
  36. 850
  37. 2210
  38. 720
  39. 210
  40. 980

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