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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 198 · 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 × 14 =
  2. 2.25 × 24 =
  3. 3.6 × 125 =
  4. 4.6 × 125 =
  5. 5.14 × 75 =
  6. 6.28 × 65 =
  7. 7.55 × 40 =
  8. 8.34 × 15 =
  9. 9.22 × 75 =
  10. 10.6 × 25 =
  11. 11.45 × 38 =
  12. 12.125 × 20 =
  13. 13.35 × 6 =
  14. 14.8 × 15 =
  15. 15.25 × 8 =
  16. 16.75 × 10 =
  17. 17.25 × 22 =
  18. 18.55 × 14 =
  19. 19.40 × 15 =
  20. 20.15 × 16 =
  21. 21.38 × 55 =
  22. 22.28 × 75 =
  23. 23.16 × 75 =
  24. 24.36 × 15 =
  25. 25.55 × 24 =
  26. 26.25 × 38 =
  27. 27.24 × 125 =
  28. 28.75 × 14 =
  29. 29.24 × 25 =
  30. 30.16 × 45 =
  31. 31.8 × 45 =
  32. 32.75 × 12 =
  33. 33.55 × 34 =
  34. 34.30 × 55 =
  35. 35.6 × 25 =
  36. 36.40 × 35 =
  37. 37.45 × 8 =
  38. 38.75 × 10 =
  39. 39.25 × 32 =
  40. 40.20 × 75 =

Answer key

  1. 630
  2. 600
  3. 750
  4. 750
  5. 1050
  6. 1820
  7. 2200
  8. 510
  9. 1650
  10. 150
  11. 1710
  12. 2500
  13. 210
  14. 120
  15. 200
  16. 750
  17. 550
  18. 770
  19. 600
  20. 240
  21. 2090
  22. 2100
  23. 1200
  24. 540
  25. 1320
  26. 950
  27. 3000
  28. 1050
  29. 600
  30. 720
  31. 360
  32. 900
  33. 1870
  34. 1650
  35. 150
  36. 1400
  37. 360
  38. 750
  39. 800
  40. 1500

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