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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 825 · 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. 1.8 × 55 =
  2. 2.15 × 36 =
  3. 3.15 × 32 =
  4. 4.125 × 18 =
  5. 5.10 × 125 =
  6. 6.65 × 14 =
  7. 7.16 × 35 =
  8. 8.24 × 125 =
  9. 9.14 × 45 =
  10. 10.45 × 20 =
  11. 11.38 × 75 =
  12. 12.55 × 8 =
  13. 13.65 × 38 =
  14. 14.65 × 10 =
  15. 15.14 × 45 =
  16. 16.20 × 125 =
  17. 17.25 × 24 =
  18. 18.10 × 25 =
  19. 19.55 × 24 =
  20. 20.22 × 35 =
  21. 21.22 × 55 =
  22. 22.125 × 22 =
  23. 23.25 × 24 =
  24. 24.34 × 45 =
  25. 25.35 × 34 =
  26. 26.45 × 6 =
  27. 27.20 × 25 =
  28. 28.45 × 8 =
  29. 29.75 × 12 =
  30. 30.65 × 20 =
  31. 31.14 × 55 =
  32. 32.14 × 65 =
  33. 33.20 × 65 =
  34. 34.35 × 36 =
  35. 35.65 × 6 =
  36. 36.45 × 20 =
  37. 37.28 × 35 =
  38. 38.45 × 16 =
  39. 39.16 × 55 =
  40. 40.45 × 34 =

Answer key

  1. 440
  2. 540
  3. 480
  4. 2250
  5. 1250
  6. 910
  7. 560
  8. 3000
  9. 630
  10. 900
  11. 2850
  12. 440
  13. 2470
  14. 650
  15. 630
  16. 2500
  17. 600
  18. 250
  19. 1320
  20. 770
  21. 1210
  22. 2750
  23. 600
  24. 1530
  25. 1190
  26. 270
  27. 500
  28. 360
  29. 900
  30. 1300
  31. 770
  32. 910
  33. 1300
  34. 1260
  35. 390
  36. 900
  37. 980
  38. 720
  39. 880
  40. 1530

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