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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 816 · 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. 1.14 × 55 =
  2. 2.25 × 24 =
  3. 3.38 × 15 =
  4. 4.15 × 40 =
  5. 5.22 × 75 =
  6. 6.15 × 6 =
  7. 7.15 × 6 =
  8. 8.26 × 75 =
  9. 9.30 × 45 =
  10. 10.35 × 18 =
  11. 11.16 × 55 =
  12. 12.25 × 38 =
  13. 13.10 × 45 =
  14. 14.25 × 28 =
  15. 15.45 × 16 =
  16. 16.32 × 65 =
  17. 17.22 × 125 =
  18. 18.15 × 40 =
  19. 19.8 × 45 =
  20. 20.40 × 65 =
  21. 21.65 × 16 =
  22. 22.34 × 35 =
  23. 23.55 × 36 =
  24. 24.15 × 10 =
  25. 25.6 × 25 =
  26. 26.14 × 45 =
  27. 27.45 × 36 =
  28. 28.75 × 26 =
  29. 29.30 × 15 =
  30. 30.38 × 75 =
  31. 31.75 × 26 =
  32. 32.25 × 18 =
  33. 33.18 × 35 =
  34. 34.26 × 25 =
  35. 35.45 × 34 =
  36. 36.22 × 75 =
  37. 37.26 × 55 =
  38. 38.15 × 40 =
  39. 39.28 × 25 =
  40. 40.15 × 20 =

Answer key

  1. 770
  2. 600
  3. 570
  4. 600
  5. 1650
  6. 90
  7. 90
  8. 1950
  9. 1350
  10. 630
  11. 880
  12. 950
  13. 450
  14. 700
  15. 720
  16. 2080
  17. 2750
  18. 600
  19. 360
  20. 2600
  21. 1040
  22. 1190
  23. 1980
  24. 150
  25. 150
  26. 630
  27. 1620
  28. 1950
  29. 450
  30. 2850
  31. 1950
  32. 450
  33. 630
  34. 650
  35. 1530
  36. 1650
  37. 1430
  38. 600
  39. 700
  40. 300

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