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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 231 · 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. 1.75 × 8 =
  2. 2.24 × 35 =
  3. 3.25 × 28 =
  4. 4.15 × 10 =
  5. 5.15 × 14 =
  6. 6.45 × 26 =
  7. 7.14 × 15 =
  8. 8.125 × 8 =
  9. 9.6 × 25 =
  10. 10.8 × 45 =
  11. 11.35 × 22 =
  12. 12.35 × 38 =
  13. 13.16 × 25 =
  14. 14.65 × 26 =
  15. 15.75 × 8 =
  16. 16.25 × 16 =
  17. 17.25 × 6 =
  18. 18.34 × 15 =
  19. 19.6 × 15 =
  20. 20.15 × 24 =
  21. 21.30 × 25 =
  22. 22.125 × 10 =
  23. 23.45 × 28 =
  24. 24.36 × 35 =
  25. 25.10 × 75 =
  26. 26.18 × 125 =
  27. 27.32 × 75 =
  28. 28.34 × 25 =
  29. 29.55 × 38 =
  30. 30.65 × 14 =
  31. 31.26 × 25 =
  32. 32.8 × 25 =
  33. 33.55 × 14 =
  34. 34.25 × 12 =
  35. 35.75 × 14 =
  36. 36.28 × 35 =
  37. 37.34 × 15 =
  38. 38.35 × 8 =
  39. 39.35 × 30 =
  40. 40.25 × 26 =

Answer key

  1. 600
  2. 840
  3. 700
  4. 150
  5. 210
  6. 1170
  7. 210
  8. 1000
  9. 150
  10. 360
  11. 770
  12. 1330
  13. 400
  14. 1690
  15. 600
  16. 400
  17. 150
  18. 510
  19. 90
  20. 360
  21. 750
  22. 1250
  23. 1260
  24. 1260
  25. 750
  26. 2250
  27. 2400
  28. 850
  29. 2090
  30. 910
  31. 650
  32. 200
  33. 770
  34. 300
  35. 1050
  36. 980
  37. 510
  38. 280
  39. 1050
  40. 650

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