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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 785 · 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. 1.55 × 32 =
  2. 2.26 × 55 =
  3. 3.14 × 15 =
  4. 4.35 × 22 =
  5. 5.15 × 16 =
  6. 6.75 × 8 =
  7. 7.35 × 36 =
  8. 8.125 × 10 =
  9. 9.35 × 38 =
  10. 10.14 × 25 =
  11. 11.35 × 12 =
  12. 12.32 × 25 =
  13. 13.125 × 10 =
  14. 14.15 × 38 =
  15. 15.24 × 65 =
  16. 16.24 × 25 =
  17. 17.20 × 35 =
  18. 18.35 × 22 =
  19. 19.30 × 65 =
  20. 20.35 × 18 =
  21. 21.55 × 40 =
  22. 22.40 × 15 =
  23. 23.22 × 35 =
  24. 24.6 × 35 =
  25. 25.38 × 125 =
  26. 26.15 × 36 =
  27. 27.40 × 45 =
  28. 28.75 × 20 =
  29. 29.55 × 10 =
  30. 30.14 × 35 =
  31. 31.55 × 28 =
  32. 32.6 × 35 =
  33. 33.55 × 22 =
  34. 34.55 × 14 =
  35. 35.6 × 55 =
  36. 36.6 × 45 =
  37. 37.35 × 26 =
  38. 38.32 × 65 =
  39. 39.35 × 20 =
  40. 40.24 × 15 =

Answer key

  1. 1760
  2. 1430
  3. 210
  4. 770
  5. 240
  6. 600
  7. 1260
  8. 1250
  9. 1330
  10. 350
  11. 420
  12. 800
  13. 1250
  14. 570
  15. 1560
  16. 600
  17. 700
  18. 770
  19. 1950
  20. 630
  21. 2200
  22. 600
  23. 770
  24. 210
  25. 4750
  26. 540
  27. 1800
  28. 1500
  29. 550
  30. 490
  31. 1540
  32. 210
  33. 1210
  34. 770
  35. 330
  36. 270
  37. 910
  38. 2080
  39. 700
  40. 360

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