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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 135 · 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. 1.45 × 12 =
  2. 2.65 × 8 =
  3. 3.75 × 14 =
  4. 4.65 × 8 =
  5. 5.6 × 35 =
  6. 6.45 × 6 =
  7. 7.125 × 38 =
  8. 8.45 × 6 =
  9. 9.10 × 25 =
  10. 10.8 × 45 =
  11. 11.14 × 15 =
  12. 12.75 × 24 =
  13. 13.6 × 25 =
  14. 14.40 × 55 =
  15. 15.28 × 45 =
  16. 16.26 × 45 =
  17. 17.15 × 20 =
  18. 18.18 × 65 =
  19. 19.35 × 24 =
  20. 20.35 × 26 =
  21. 21.8 × 25 =
  22. 22.25 × 36 =
  23. 23.125 × 24 =
  24. 24.16 × 55 =
  25. 25.125 × 34 =
  26. 26.45 × 24 =
  27. 27.24 × 55 =
  28. 28.45 × 12 =
  29. 29.15 × 38 =
  30. 30.8 × 45 =
  31. 31.75 × 14 =
  32. 32.25 × 14 =
  33. 33.45 × 6 =
  34. 34.75 × 10 =
  35. 35.14 × 25 =
  36. 36.36 × 55 =
  37. 37.15 × 6 =
  38. 38.65 × 22 =
  39. 39.55 × 6 =
  40. 40.25 × 16 =

Answer key

  1. 540
  2. 520
  3. 1050
  4. 520
  5. 210
  6. 270
  7. 4750
  8. 270
  9. 250
  10. 360
  11. 210
  12. 1800
  13. 150
  14. 2200
  15. 1260
  16. 1170
  17. 300
  18. 1170
  19. 840
  20. 910
  21. 200
  22. 900
  23. 3000
  24. 880
  25. 4250
  26. 1080
  27. 1320
  28. 540
  29. 570
  30. 360
  31. 1050
  32. 350
  33. 270
  34. 750
  35. 350
  36. 1980
  37. 90
  38. 1430
  39. 330
  40. 400

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