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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 354 · 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. 1.35 × 20 =
  2. 2.125 × 6 =
  3. 3.35 × 22 =
  4. 4.15 × 26 =
  5. 5.14 × 25 =
  6. 6.65 × 16 =
  7. 7.40 × 15 =
  8. 8.35 × 40 =
  9. 9.18 × 125 =
  10. 10.65 × 14 =
  11. 11.20 × 25 =
  12. 12.25 × 30 =
  13. 13.32 × 25 =
  14. 14.6 × 15 =
  15. 15.55 × 20 =
  16. 16.55 × 28 =
  17. 17.20 × 25 =
  18. 18.12 × 25 =
  19. 19.15 × 26 =
  20. 20.28 × 55 =
  21. 21.8 × 75 =
  22. 22.65 × 32 =
  23. 23.35 × 30 =
  24. 24.75 × 32 =
  25. 25.34 × 25 =
  26. 26.45 × 22 =
  27. 27.20 × 25 =
  28. 28.24 × 25 =
  29. 29.45 × 14 =
  30. 30.25 × 20 =
  31. 31.16 × 45 =
  32. 32.34 × 35 =
  33. 33.15 × 24 =
  34. 34.65 × 32 =
  35. 35.45 × 26 =
  36. 36.30 × 75 =
  37. 37.15 × 26 =
  38. 38.40 × 15 =
  39. 39.12 × 45 =
  40. 40.45 × 32 =

Answer key

  1. 700
  2. 750
  3. 770
  4. 390
  5. 350
  6. 1040
  7. 600
  8. 1400
  9. 2250
  10. 910
  11. 500
  12. 750
  13. 800
  14. 90
  15. 1100
  16. 1540
  17. 500
  18. 300
  19. 390
  20. 1540
  21. 600
  22. 2080
  23. 1050
  24. 2400
  25. 850
  26. 990
  27. 500
  28. 600
  29. 630
  30. 500
  31. 720
  32. 1190
  33. 360
  34. 2080
  35. 1170
  36. 2250
  37. 390
  38. 600
  39. 540
  40. 1440

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