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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 139 · 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 × 45 =
  2. 2.25 × 12 =
  3. 3.14 × 75 =
  4. 4.32 × 125 =
  5. 5.75 × 40 =
  6. 6.20 × 25 =
  7. 7.45 × 20 =
  8. 8.40 × 25 =
  9. 9.20 × 25 =
  10. 10.15 × 26 =
  11. 11.25 × 18 =
  12. 12.65 × 32 =
  13. 13.30 × 15 =
  14. 14.25 × 22 =
  15. 15.25 × 28 =
  16. 16.30 × 125 =
  17. 17.45 × 8 =
  18. 18.34 × 15 =
  19. 19.45 × 6 =
  20. 20.55 × 6 =
  21. 21.35 × 22 =
  22. 22.16 × 25 =
  23. 23.36 × 15 =
  24. 24.55 × 10 =
  25. 25.35 × 6 =
  26. 26.20 × 25 =
  27. 27.35 × 22 =
  28. 28.35 × 14 =
  29. 29.36 × 45 =
  30. 30.75 × 16 =
  31. 31.65 × 20 =
  32. 32.30 × 55 =
  33. 33.45 × 8 =
  34. 34.45 × 32 =
  35. 35.16 × 75 =
  36. 36.14 × 25 =
  37. 37.25 × 40 =
  38. 38.75 × 8 =
  39. 39.35 × 16 =
  40. 40.32 × 45 =

Answer key

  1. 1440
  2. 300
  3. 1050
  4. 4000
  5. 3000
  6. 500
  7. 900
  8. 1000
  9. 500
  10. 390
  11. 450
  12. 2080
  13. 450
  14. 550
  15. 700
  16. 3750
  17. 360
  18. 510
  19. 270
  20. 330
  21. 770
  22. 400
  23. 540
  24. 550
  25. 210
  26. 500
  27. 770
  28. 490
  29. 1620
  30. 1200
  31. 1300
  32. 1650
  33. 360
  34. 1440
  35. 1200
  36. 350
  37. 1000
  38. 600
  39. 560
  40. 1440

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