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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 197 · 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 × 8 =
  2. 2.18 × 45 =
  3. 3.25 × 6 =
  4. 4.34 × 25 =
  5. 5.45 × 24 =
  6. 6.32 × 25 =
  7. 7.35 × 12 =
  8. 8.8 × 25 =
  9. 9.34 × 15 =
  10. 10.40 × 35 =
  11. 11.18 × 65 =
  12. 12.35 × 6 =
  13. 13.35 × 24 =
  14. 14.12 × 125 =
  15. 15.125 × 8 =
  16. 16.25 × 30 =
  17. 17.24 × 35 =
  18. 18.35 × 34 =
  19. 19.10 × 15 =
  20. 20.45 × 8 =
  21. 21.22 × 55 =
  22. 22.45 × 6 =
  23. 23.6 × 45 =
  24. 24.15 × 36 =
  25. 25.15 × 20 =
  26. 26.35 × 6 =
  27. 27.125 × 40 =
  28. 28.65 × 12 =
  29. 29.65 × 16 =
  30. 30.55 × 30 =
  31. 31.125 × 10 =
  32. 32.65 × 22 =
  33. 33.38 × 15 =
  34. 34.24 × 45 =
  35. 35.55 × 10 =
  36. 36.32 × 25 =
  37. 37.35 × 32 =
  38. 38.65 × 38 =
  39. 39.34 × 35 =
  40. 40.65 × 14 =

Answer key

  1. 360
  2. 810
  3. 150
  4. 850
  5. 1080
  6. 800
  7. 420
  8. 200
  9. 510
  10. 1400
  11. 1170
  12. 210
  13. 840
  14. 1500
  15. 1000
  16. 750
  17. 840
  18. 1190
  19. 150
  20. 360
  21. 1210
  22. 270
  23. 270
  24. 540
  25. 300
  26. 210
  27. 5000
  28. 780
  29. 1040
  30. 1650
  31. 1250
  32. 1430
  33. 570
  34. 1080
  35. 550
  36. 800
  37. 1120
  38. 2470
  39. 1190
  40. 910

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