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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 260 · 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. 1.22 × 15 =
  2. 2.45 × 24 =
  3. 3.30 × 125 =
  4. 4.32 × 15 =
  5. 5.32 × 125 =
  6. 6.26 × 35 =
  7. 7.8 × 15 =
  8. 8.12 × 15 =
  9. 9.15 × 10 =
  10. 10.65 × 18 =
  11. 11.25 × 20 =
  12. 12.6 × 55 =
  13. 13.35 × 34 =
  14. 14.34 × 15 =
  15. 15.28 × 125 =
  16. 16.36 × 25 =
  17. 17.65 × 8 =
  18. 18.35 × 10 =
  19. 19.28 × 55 =
  20. 20.20 × 25 =
  21. 21.16 × 15 =
  22. 22.55 × 32 =
  23. 23.15 × 26 =
  24. 24.28 × 25 =
  25. 25.125 × 32 =
  26. 26.15 × 8 =
  27. 27.65 × 8 =
  28. 28.75 × 18 =
  29. 29.24 × 55 =
  30. 30.75 × 38 =
  31. 31.8 × 45 =
  32. 32.28 × 35 =
  33. 33.15 × 34 =
  34. 34.25 × 14 =
  35. 35.55 × 16 =
  36. 36.25 × 8 =
  37. 37.45 × 22 =
  38. 38.40 × 65 =
  39. 39.55 × 36 =
  40. 40.32 × 25 =

Answer key

  1. 330
  2. 1080
  3. 3750
  4. 480
  5. 4000
  6. 910
  7. 120
  8. 180
  9. 150
  10. 1170
  11. 500
  12. 330
  13. 1190
  14. 510
  15. 3500
  16. 900
  17. 520
  18. 350
  19. 1540
  20. 500
  21. 240
  22. 1760
  23. 390
  24. 700
  25. 4000
  26. 120
  27. 520
  28. 1350
  29. 1320
  30. 2850
  31. 360
  32. 980
  33. 510
  34. 350
  35. 880
  36. 200
  37. 990
  38. 2600
  39. 1980
  40. 800

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