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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 603 · 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. 1.32 × 15 =
  2. 2.65 × 26 =
  3. 3.12 × 125 =
  4. 4.65 × 30 =
  5. 5.55 × 14 =
  6. 6.26 × 65 =
  7. 7.38 × 75 =
  8. 8.14 × 25 =
  9. 9.15 × 40 =
  10. 10.15 × 12 =
  11. 11.75 × 18 =
  12. 12.14 × 15 =
  13. 13.14 × 125 =
  14. 14.25 × 8 =
  15. 15.25 × 22 =
  16. 16.16 × 25 =
  17. 17.125 × 40 =
  18. 18.45 × 20 =
  19. 19.26 × 35 =
  20. 20.8 × 125 =
  21. 21.16 × 125 =
  22. 22.35 × 32 =
  23. 23.34 × 55 =
  24. 24.125 × 36 =
  25. 25.16 × 55 =
  26. 26.8 × 25 =
  27. 27.6 × 125 =
  28. 28.55 × 14 =
  29. 29.15 × 30 =
  30. 30.12 × 55 =
  31. 31.15 × 10 =
  32. 32.35 × 20 =
  33. 33.26 × 25 =
  34. 34.75 × 6 =
  35. 35.25 × 34 =
  36. 36.55 × 8 =
  37. 37.10 × 25 =
  38. 38.30 × 35 =
  39. 39.26 × 65 =
  40. 40.65 × 6 =

Answer key

  1. 480
  2. 1690
  3. 1500
  4. 1950
  5. 770
  6. 1690
  7. 2850
  8. 350
  9. 600
  10. 180
  11. 1350
  12. 210
  13. 1750
  14. 200
  15. 550
  16. 400
  17. 5000
  18. 900
  19. 910
  20. 1000
  21. 2000
  22. 1120
  23. 1870
  24. 4500
  25. 880
  26. 200
  27. 750
  28. 770
  29. 450
  30. 660
  31. 150
  32. 700
  33. 650
  34. 450
  35. 850
  36. 440
  37. 250
  38. 1050
  39. 1690
  40. 390

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