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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 441 · 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 × 30 =
  2. 2.38 × 65 =
  3. 3.55 × 24 =
  4. 4.24 × 65 =
  5. 5.34 × 35 =
  6. 6.8 × 125 =
  7. 7.14 × 25 =
  8. 8.6 × 45 =
  9. 9.45 × 6 =
  10. 10.45 × 12 =
  11. 11.15 × 10 =
  12. 12.45 × 20 =
  13. 13.25 × 12 =
  14. 14.26 × 125 =
  15. 15.32 × 125 =
  16. 16.35 × 6 =
  17. 17.65 × 14 =
  18. 18.36 × 125 =
  19. 19.55 × 16 =
  20. 20.18 × 55 =
  21. 21.125 × 8 =
  22. 22.125 × 8 =
  23. 23.75 × 24 =
  24. 24.6 × 125 =
  25. 25.20 × 15 =
  26. 26.15 × 26 =
  27. 27.45 × 26 =
  28. 28.75 × 18 =
  29. 29.24 × 45 =
  30. 30.35 × 32 =
  31. 31.25 × 36 =
  32. 32.65 × 24 =
  33. 33.30 × 35 =
  34. 34.125 × 10 =
  35. 35.65 × 34 =
  36. 36.45 × 14 =
  37. 37.12 × 75 =
  38. 38.6 × 55 =
  39. 39.25 × 16 =
  40. 40.45 × 36 =

Answer key

  1. 750
  2. 2470
  3. 1320
  4. 1560
  5. 1190
  6. 1000
  7. 350
  8. 270
  9. 270
  10. 540
  11. 150
  12. 900
  13. 300
  14. 3250
  15. 4000
  16. 210
  17. 910
  18. 4500
  19. 880
  20. 990
  21. 1000
  22. 1000
  23. 1800
  24. 750
  25. 300
  26. 390
  27. 1170
  28. 1350
  29. 1080
  30. 1120
  31. 900
  32. 1560
  33. 1050
  34. 1250
  35. 2210
  36. 630
  37. 900
  38. 330
  39. 400
  40. 1620

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