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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 652 · 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. 1.45 × 22 =
  2. 2.75 × 38 =
  3. 3.15 × 30 =
  4. 4.26 × 15 =
  5. 5.65 × 14 =
  6. 6.25 × 14 =
  7. 7.32 × 15 =
  8. 8.65 × 18 =
  9. 9.36 × 65 =
  10. 10.18 × 15 =
  11. 11.75 × 14 =
  12. 12.14 × 55 =
  13. 13.38 × 15 =
  14. 14.32 × 55 =
  15. 15.15 × 8 =
  16. 16.6 × 75 =
  17. 17.45 × 6 =
  18. 18.65 × 12 =
  19. 19.55 × 40 =
  20. 20.15 × 16 =
  21. 21.38 × 65 =
  22. 22.40 × 55 =
  23. 23.25 × 20 =
  24. 24.125 × 20 =
  25. 25.15 × 10 =
  26. 26.12 × 25 =
  27. 27.12 × 75 =
  28. 28.12 × 25 =
  29. 29.15 × 36 =
  30. 30.75 × 12 =
  31. 31.65 × 30 =
  32. 32.55 × 34 =
  33. 33.28 × 25 =
  34. 34.15 × 6 =
  35. 35.25 × 20 =
  36. 36.24 × 25 =
  37. 37.45 × 18 =
  38. 38.8 × 15 =
  39. 39.28 × 25 =
  40. 40.35 × 26 =

Answer key

  1. 990
  2. 2850
  3. 450
  4. 390
  5. 910
  6. 350
  7. 480
  8. 1170
  9. 2340
  10. 270
  11. 1050
  12. 770
  13. 570
  14. 1760
  15. 120
  16. 450
  17. 270
  18. 780
  19. 2200
  20. 240
  21. 2470
  22. 2200
  23. 500
  24. 2500
  25. 150
  26. 300
  27. 900
  28. 300
  29. 540
  30. 900
  31. 1950
  32. 1870
  33. 700
  34. 90
  35. 500
  36. 600
  37. 810
  38. 120
  39. 700
  40. 910

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