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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 504 · 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. 1.18 × 65 =
  2. 2.8 × 15 =
  3. 3.22 × 45 =
  4. 4.34 × 35 =
  5. 5.125 × 12 =
  6. 6.35 × 30 =
  7. 7.6 × 125 =
  8. 8.28 × 45 =
  9. 9.30 × 75 =
  10. 10.35 × 8 =
  11. 11.15 × 20 =
  12. 12.15 × 22 =
  13. 13.35 × 38 =
  14. 14.15 × 18 =
  15. 15.18 × 65 =
  16. 16.34 × 15 =
  17. 17.20 × 45 =
  18. 18.45 × 6 =
  19. 19.26 × 25 =
  20. 20.14 × 75 =
  21. 21.25 × 8 =
  22. 22.40 × 75 =
  23. 23.22 × 25 =
  24. 24.55 × 16 =
  25. 25.26 × 15 =
  26. 26.38 × 65 =
  27. 27.55 × 10 =
  28. 28.65 × 38 =
  29. 29.40 × 75 =
  30. 30.15 × 16 =
  31. 31.16 × 65 =
  32. 32.18 × 75 =
  33. 33.40 × 125 =
  34. 34.15 × 14 =
  35. 35.65 × 24 =
  36. 36.35 × 38 =
  37. 37.24 × 15 =
  38. 38.55 × 8 =
  39. 39.32 × 45 =
  40. 40.25 × 30 =

Answer key

  1. 1170
  2. 120
  3. 990
  4. 1190
  5. 1500
  6. 1050
  7. 750
  8. 1260
  9. 2250
  10. 280
  11. 300
  12. 330
  13. 1330
  14. 270
  15. 1170
  16. 510
  17. 900
  18. 270
  19. 650
  20. 1050
  21. 200
  22. 3000
  23. 550
  24. 880
  25. 390
  26. 2470
  27. 550
  28. 2470
  29. 3000
  30. 240
  31. 1040
  32. 1350
  33. 5000
  34. 210
  35. 1560
  36. 1330
  37. 360
  38. 440
  39. 1440
  40. 750

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