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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 392 · 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 × 14 =
  2. 2.25 × 30 =
  3. 3.45 × 14 =
  4. 4.22 × 15 =
  5. 5.65 × 30 =
  6. 6.15 × 12 =
  7. 7.75 × 6 =
  8. 8.14 × 25 =
  9. 9.55 × 38 =
  10. 10.15 × 20 =
  11. 11.65 × 10 =
  12. 12.15 × 40 =
  13. 13.125 × 20 =
  14. 14.14 × 25 =
  15. 15.36 × 45 =
  16. 16.65 × 38 =
  17. 17.32 × 125 =
  18. 18.24 × 75 =
  19. 19.15 × 8 =
  20. 20.22 × 55 =
  21. 21.32 × 75 =
  22. 22.125 × 16 =
  23. 23.10 × 35 =
  24. 24.55 × 22 =
  25. 25.26 × 75 =
  26. 26.55 × 8 =
  27. 27.14 × 35 =
  28. 28.125 × 20 =
  29. 29.10 × 75 =
  30. 30.40 × 25 =
  31. 31.45 × 32 =
  32. 32.55 × 26 =
  33. 33.34 × 15 =
  34. 34.6 × 35 =
  35. 35.38 × 65 =
  36. 36.65 × 30 =
  37. 37.6 × 45 =
  38. 38.28 × 125 =
  39. 39.75 × 26 =
  40. 40.32 × 45 =

Answer key

  1. 350
  2. 750
  3. 630
  4. 330
  5. 1950
  6. 180
  7. 450
  8. 350
  9. 2090
  10. 300
  11. 650
  12. 600
  13. 2500
  14. 350
  15. 1620
  16. 2470
  17. 4000
  18. 1800
  19. 120
  20. 1210
  21. 2400
  22. 2000
  23. 350
  24. 1210
  25. 1950
  26. 440
  27. 490
  28. 2500
  29. 750
  30. 1000
  31. 1440
  32. 1430
  33. 510
  34. 210
  35. 2470
  36. 1950
  37. 270
  38. 3500
  39. 1950
  40. 1440

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