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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 42 · 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. 1.75 × 12 =
  2. 2.20 × 25 =
  3. 3.125 × 8 =
  4. 4.36 × 55 =
  5. 5.75 × 32 =
  6. 6.75 × 12 =
  7. 7.125 × 10 =
  8. 8.8 × 35 =
  9. 9.65 × 8 =
  10. 10.16 × 25 =
  11. 11.18 × 45 =
  12. 12.25 × 32 =
  13. 13.35 × 32 =
  14. 14.10 × 25 =
  15. 15.38 × 25 =
  16. 16.45 × 18 =
  17. 17.35 × 12 =
  18. 18.14 × 15 =
  19. 19.16 × 25 =
  20. 20.55 × 40 =
  21. 21.35 × 6 =
  22. 22.22 × 125 =
  23. 23.24 × 55 =
  24. 24.35 × 12 =
  25. 25.45 × 26 =
  26. 26.34 × 55 =
  27. 27.45 × 24 =
  28. 28.8 × 25 =
  29. 29.14 × 35 =
  30. 30.38 × 35 =
  31. 31.25 × 12 =
  32. 32.14 × 45 =
  33. 33.8 × 75 =
  34. 34.12 × 125 =
  35. 35.24 × 125 =
  36. 36.25 × 38 =
  37. 37.14 × 125 =
  38. 38.55 × 40 =
  39. 39.15 × 36 =
  40. 40.55 × 8 =

Answer key

  1. 900
  2. 500
  3. 1000
  4. 1980
  5. 2400
  6. 900
  7. 1250
  8. 280
  9. 520
  10. 400
  11. 810
  12. 800
  13. 1120
  14. 250
  15. 950
  16. 810
  17. 420
  18. 210
  19. 400
  20. 2200
  21. 210
  22. 2750
  23. 1320
  24. 420
  25. 1170
  26. 1870
  27. 1080
  28. 200
  29. 490
  30. 1330
  31. 300
  32. 630
  33. 600
  34. 1500
  35. 3000
  36. 950
  37. 1750
  38. 2200
  39. 540
  40. 440

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