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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 741 · 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. 2.8 × 55 =
  3. 3.22 × 15 =
  4. 4.65 × 6 =
  5. 5.14 × 75 =
  6. 6.10 × 125 =
  7. 7.45 × 6 =
  8. 8.65 × 20 =
  9. 9.25 × 6 =
  10. 10.14 × 75 =
  11. 11.15 × 14 =
  12. 12.65 × 34 =
  13. 13.125 × 22 =
  14. 14.25 × 18 =
  15. 15.6 × 55 =
  16. 16.35 × 40 =
  17. 17.45 × 10 =
  18. 18.8 × 45 =
  19. 19.125 × 30 =
  20. 20.125 × 8 =
  21. 21.12 × 75 =
  22. 22.15 × 20 =
  23. 23.55 × 12 =
  24. 24.30 × 125 =
  25. 25.36 × 45 =
  26. 26.30 × 15 =
  27. 27.12 × 75 =
  28. 28.14 × 45 =
  29. 29.125 × 8 =
  30. 30.16 × 25 =
  31. 31.25 × 30 =
  32. 32.25 × 10 =
  33. 33.25 × 36 =
  34. 34.125 × 32 =
  35. 35.125 × 30 =
  36. 36.125 × 28 =
  37. 37.36 × 55 =
  38. 38.10 × 15 =
  39. 39.35 × 10 =
  40. 40.20 × 15 =

Answer key

  1. 150
  2. 440
  3. 330
  4. 390
  5. 1050
  6. 1250
  7. 270
  8. 1300
  9. 150
  10. 1050
  11. 210
  12. 2210
  13. 2750
  14. 450
  15. 330
  16. 1400
  17. 450
  18. 360
  19. 3750
  20. 1000
  21. 900
  22. 300
  23. 660
  24. 3750
  25. 1620
  26. 450
  27. 900
  28. 630
  29. 1000
  30. 400
  31. 750
  32. 250
  33. 900
  34. 4000
  35. 3750
  36. 3500
  37. 1980
  38. 150
  39. 350
  40. 300

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