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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 91 · 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 × 28 =
  2. 2.15 × 20 =
  3. 3.26 × 25 =
  4. 4.14 × 55 =
  5. 5.65 × 36 =
  6. 6.55 × 8 =
  7. 7.24 × 55 =
  8. 8.45 × 34 =
  9. 9.45 × 10 =
  10. 10.12 × 55 =
  11. 11.75 × 30 =
  12. 12.75 × 22 =
  13. 13.18 × 25 =
  14. 14.24 × 45 =
  15. 15.20 × 55 =
  16. 16.32 × 25 =
  17. 17.65 × 10 =
  18. 18.6 × 65 =
  19. 19.65 × 28 =
  20. 20.26 × 75 =
  21. 21.55 × 22 =
  22. 22.16 × 25 =
  23. 23.25 × 22 =
  24. 24.12 × 15 =
  25. 25.36 × 55 =
  26. 26.15 × 20 =
  27. 27.34 × 25 =
  28. 28.35 × 6 =
  29. 29.125 × 12 =
  30. 30.55 × 24 =
  31. 31.8 × 15 =
  32. 32.55 × 28 =
  33. 33.20 × 35 =
  34. 34.15 × 40 =
  35. 35.38 × 65 =
  36. 36.36 × 75 =
  37. 37.25 × 8 =
  38. 38.45 × 18 =
  39. 39.65 × 10 =
  40. 40.12 × 75 =

Answer key

  1. 700
  2. 300
  3. 650
  4. 770
  5. 2340
  6. 440
  7. 1320
  8. 1530
  9. 450
  10. 660
  11. 2250
  12. 1650
  13. 450
  14. 1080
  15. 1100
  16. 800
  17. 650
  18. 390
  19. 1820
  20. 1950
  21. 1210
  22. 400
  23. 550
  24. 180
  25. 1980
  26. 300
  27. 850
  28. 210
  29. 1500
  30. 1320
  31. 120
  32. 1540
  33. 700
  34. 600
  35. 2470
  36. 2700
  37. 200
  38. 810
  39. 650
  40. 900

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