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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 761 · 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 × 6 =
  2. 2.36 × 45 =
  3. 3.38 × 35 =
  4. 4.6 × 125 =
  5. 5.24 × 65 =
  6. 6.6 × 125 =
  7. 7.25 × 12 =
  8. 8.75 × 28 =
  9. 9.28 × 25 =
  10. 10.15 × 36 =
  11. 11.65 × 38 =
  12. 12.65 × 38 =
  13. 13.40 × 25 =
  14. 14.75 × 30 =
  15. 15.6 × 15 =
  16. 16.25 × 12 =
  17. 17.45 × 22 =
  18. 18.26 × 125 =
  19. 19.34 × 25 =
  20. 20.10 × 35 =
  21. 21.25 × 10 =
  22. 22.45 × 10 =
  23. 23.36 × 15 =
  24. 24.20 × 65 =
  25. 25.125 × 28 =
  26. 26.125 × 36 =
  27. 27.25 × 12 =
  28. 28.35 × 8 =
  29. 29.45 × 10 =
  30. 30.32 × 15 =
  31. 31.18 × 75 =
  32. 32.6 × 45 =
  33. 33.55 × 12 =
  34. 34.55 × 8 =
  35. 35.15 × 38 =
  36. 36.55 × 24 =
  37. 37.35 × 34 =
  38. 38.16 × 25 =
  39. 39.55 × 28 =
  40. 40.8 × 45 =

Answer key

  1. 150
  2. 1620
  3. 1330
  4. 750
  5. 1560
  6. 750
  7. 300
  8. 2100
  9. 700
  10. 540
  11. 2470
  12. 2470
  13. 1000
  14. 2250
  15. 90
  16. 300
  17. 990
  18. 3250
  19. 850
  20. 350
  21. 250
  22. 450
  23. 540
  24. 1300
  25. 3500
  26. 4500
  27. 300
  28. 280
  29. 450
  30. 480
  31. 1350
  32. 270
  33. 660
  34. 440
  35. 570
  36. 1320
  37. 1190
  38. 400
  39. 1540
  40. 360

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