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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 105 · 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. 2.18 × 55 =
  3. 3.15 × 22 =
  4. 4.28 × 45 =
  5. 5.20 × 125 =
  6. 6.6 × 25 =
  7. 7.55 × 24 =
  8. 8.14 × 25 =
  9. 9.35 × 12 =
  10. 10.35 × 28 =
  11. 11.55 × 28 =
  12. 12.34 × 125 =
  13. 13.10 × 125 =
  14. 14.28 × 55 =
  15. 15.75 × 28 =
  16. 16.26 × 45 =
  17. 17.38 × 55 =
  18. 18.16 × 35 =
  19. 19.35 × 14 =
  20. 20.16 × 45 =
  21. 21.40 × 65 =
  22. 22.36 × 15 =
  23. 23.12 × 75 =
  24. 24.65 × 30 =
  25. 25.55 × 14 =
  26. 26.6 × 15 =
  27. 27.125 × 34 =
  28. 28.30 × 25 =
  29. 29.38 × 65 =
  30. 30.10 × 125 =
  31. 31.55 × 18 =
  32. 32.12 × 125 =
  33. 33.75 × 20 =
  34. 34.15 × 20 =
  35. 35.25 × 16 =
  36. 36.30 × 25 =
  37. 37.14 × 15 =
  38. 38.12 × 45 =
  39. 39.65 × 36 =
  40. 40.20 × 45 =

Answer key

  1. 350
  2. 990
  3. 330
  4. 1260
  5. 2500
  6. 150
  7. 1320
  8. 350
  9. 420
  10. 980
  11. 1540
  12. 4250
  13. 1250
  14. 1540
  15. 2100
  16. 1170
  17. 2090
  18. 560
  19. 490
  20. 720
  21. 2600
  22. 540
  23. 900
  24. 1950
  25. 770
  26. 90
  27. 4250
  28. 750
  29. 2470
  30. 1250
  31. 990
  32. 1500
  33. 1500
  34. 300
  35. 400
  36. 750
  37. 210
  38. 540
  39. 2340
  40. 900

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