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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 616 · 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. 1.6 × 65 =
  2. 2.55 × 36 =
  3. 3.22 × 25 =
  4. 4.45 × 10 =
  5. 5.22 × 75 =
  6. 6.16 × 15 =
  7. 7.12 × 55 =
  8. 8.40 × 15 =
  9. 9.34 × 25 =
  10. 10.26 × 35 =
  11. 11.55 × 24 =
  12. 12.14 × 25 =
  13. 13.14 × 45 =
  14. 14.55 × 6 =
  15. 15.125 × 36 =
  16. 16.75 × 34 =
  17. 17.45 × 40 =
  18. 18.24 × 15 =
  19. 19.55 × 36 =
  20. 20.15 × 10 =
  21. 21.12 × 15 =
  22. 22.34 × 45 =
  23. 23.10 × 35 =
  24. 24.22 × 65 =
  25. 25.45 × 16 =
  26. 26.125 × 8 =
  27. 27.35 × 10 =
  28. 28.75 × 6 =
  29. 29.25 × 36 =
  30. 30.45 × 32 =
  31. 31.125 × 36 =
  32. 32.8 × 25 =
  33. 33.12 × 15 =
  34. 34.125 × 22 =
  35. 35.12 × 25 =
  36. 36.45 × 34 =
  37. 37.35 × 40 =
  38. 38.15 × 22 =
  39. 39.75 × 8 =
  40. 40.35 × 10 =

Answer key

  1. 390
  2. 1980
  3. 550
  4. 450
  5. 1650
  6. 240
  7. 660
  8. 600
  9. 850
  10. 910
  11. 1320
  12. 350
  13. 630
  14. 330
  15. 4500
  16. 2550
  17. 1800
  18. 360
  19. 1980
  20. 150
  21. 180
  22. 1530
  23. 350
  24. 1430
  25. 720
  26. 1000
  27. 350
  28. 450
  29. 900
  30. 1440
  31. 4500
  32. 200
  33. 180
  34. 2750
  35. 300
  36. 1530
  37. 1400
  38. 330
  39. 600
  40. 350

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