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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 765 · 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. 1.25 × 16 =
  2. 2.75 × 8 =
  3. 3.25 × 6 =
  4. 4.55 × 14 =
  5. 5.45 × 38 =
  6. 6.75 × 30 =
  7. 7.25 × 8 =
  8. 8.25 × 10 =
  9. 9.36 × 55 =
  10. 10.22 × 45 =
  11. 11.22 × 65 =
  12. 12.55 × 12 =
  13. 13.36 × 55 =
  14. 14.45 × 32 =
  15. 15.35 × 26 =
  16. 16.15 × 6 =
  17. 17.35 × 8 =
  18. 18.14 × 55 =
  19. 19.55 × 28 =
  20. 20.25 × 38 =
  21. 21.125 × 22 =
  22. 22.15 × 34 =
  23. 23.125 × 22 =
  24. 24.65 × 38 =
  25. 25.55 × 34 =
  26. 26.12 × 25 =
  27. 27.20 × 75 =
  28. 28.38 × 15 =
  29. 29.32 × 125 =
  30. 30.26 × 15 =
  31. 31.65 × 38 =
  32. 32.6 × 125 =
  33. 33.10 × 65 =
  34. 34.65 × 8 =
  35. 35.65 × 12 =
  36. 36.38 × 15 =
  37. 37.26 × 15 =
  38. 38.36 × 45 =
  39. 39.10 × 15 =
  40. 40.8 × 55 =

Answer key

  1. 400
  2. 600
  3. 150
  4. 770
  5. 1710
  6. 2250
  7. 200
  8. 250
  9. 1980
  10. 990
  11. 1430
  12. 660
  13. 1980
  14. 1440
  15. 910
  16. 90
  17. 280
  18. 770
  19. 1540
  20. 950
  21. 2750
  22. 510
  23. 2750
  24. 2470
  25. 1870
  26. 300
  27. 1500
  28. 570
  29. 4000
  30. 390
  31. 2470
  32. 750
  33. 650
  34. 520
  35. 780
  36. 570
  37. 390
  38. 1620
  39. 150
  40. 440

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