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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 472 · 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. 1.36 × 25 =
  2. 2.34 × 75 =
  3. 3.38 × 15 =
  4. 4.10 × 45 =
  5. 5.16 × 35 =
  6. 6.25 × 28 =
  7. 7.38 × 25 =
  8. 8.18 × 25 =
  9. 9.15 × 30 =
  10. 10.25 × 12 =
  11. 11.32 × 125 =
  12. 12.36 × 25 =
  13. 13.25 × 26 =
  14. 14.36 × 55 =
  15. 15.125 × 30 =
  16. 16.22 × 25 =
  17. 17.75 × 26 =
  18. 18.30 × 125 =
  19. 19.6 × 15 =
  20. 20.65 × 10 =
  21. 21.15 × 34 =
  22. 22.45 × 26 =
  23. 23.125 × 14 =
  24. 24.15 × 6 =
  25. 25.36 × 55 =
  26. 26.16 × 45 =
  27. 27.12 × 35 =
  28. 28.125 × 22 =
  29. 29.36 × 45 =
  30. 30.8 × 35 =
  31. 31.125 × 30 =
  32. 32.24 × 65 =
  33. 33.6 × 15 =
  34. 34.125 × 28 =
  35. 35.65 × 8 =
  36. 36.125 × 12 =
  37. 37.30 × 15 =
  38. 38.10 × 75 =
  39. 39.28 × 55 =
  40. 40.35 × 32 =

Answer key

  1. 900
  2. 2550
  3. 570
  4. 450
  5. 560
  6. 700
  7. 950
  8. 450
  9. 450
  10. 300
  11. 4000
  12. 900
  13. 650
  14. 1980
  15. 3750
  16. 550
  17. 1950
  18. 3750
  19. 90
  20. 650
  21. 510
  22. 1170
  23. 1750
  24. 90
  25. 1980
  26. 720
  27. 420
  28. 2750
  29. 1620
  30. 280
  31. 3750
  32. 1560
  33. 90
  34. 3500
  35. 520
  36. 1500
  37. 450
  38. 750
  39. 1540
  40. 1120

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