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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 727 · 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. 1.25 × 6 =
  2. 2.8 × 25 =
  3. 3.24 × 45 =
  4. 4.45 × 18 =
  5. 5.36 × 65 =
  6. 6.65 × 16 =
  7. 7.34 × 125 =
  8. 8.6 × 25 =
  9. 9.25 × 8 =
  10. 10.75 × 40 =
  11. 11.12 × 55 =
  12. 12.45 × 26 =
  13. 13.55 × 36 =
  14. 14.18 × 75 =
  15. 15.38 × 25 =
  16. 16.35 × 22 =
  17. 17.55 × 8 =
  18. 18.20 × 75 =
  19. 19.34 × 75 =
  20. 20.22 × 65 =
  21. 21.55 × 14 =
  22. 22.75 × 18 =
  23. 23.14 × 15 =
  24. 24.65 × 28 =
  25. 25.65 × 8 =
  26. 26.65 × 30 =
  27. 27.35 × 8 =
  28. 28.8 × 25 =
  29. 29.25 × 6 =
  30. 30.25 × 24 =
  31. 31.125 × 16 =
  32. 32.45 × 26 =
  33. 33.8 × 65 =
  34. 34.125 × 38 =
  35. 35.30 × 75 =
  36. 36.75 × 18 =
  37. 37.15 × 8 =
  38. 38.6 × 125 =
  39. 39.14 × 25 =
  40. 40.30 × 55 =

Answer key

  1. 150
  2. 200
  3. 1080
  4. 810
  5. 2340
  6. 1040
  7. 4250
  8. 150
  9. 200
  10. 3000
  11. 660
  12. 1170
  13. 1980
  14. 1350
  15. 950
  16. 770
  17. 440
  18. 1500
  19. 2550
  20. 1430
  21. 770
  22. 1350
  23. 210
  24. 1820
  25. 520
  26. 1950
  27. 280
  28. 200
  29. 150
  30. 600
  31. 2000
  32. 1170
  33. 520
  34. 4750
  35. 2250
  36. 1350
  37. 120
  38. 750
  39. 350
  40. 1650

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