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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 425 · 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. 1.36 × 25 =
  2. 2.30 × 65 =
  3. 3.36 × 65 =
  4. 4.28 × 55 =
  5. 5.6 × 25 =
  6. 6.40 × 75 =
  7. 7.35 × 22 =
  8. 8.65 × 18 =
  9. 9.125 × 8 =
  10. 10.16 × 45 =
  11. 11.22 × 55 =
  12. 12.55 × 40 =
  13. 13.32 × 15 =
  14. 14.45 × 30 =
  15. 15.75 × 32 =
  16. 16.40 × 75 =
  17. 17.34 × 15 =
  18. 18.10 × 75 =
  19. 19.16 × 15 =
  20. 20.55 × 38 =
  21. 21.55 × 8 =
  22. 22.25 × 36 =
  23. 23.55 × 36 =
  24. 24.35 × 36 =
  25. 25.15 × 38 =
  26. 26.25 × 8 =
  27. 27.32 × 65 =
  28. 28.10 × 125 =
  29. 29.28 × 55 =
  30. 30.75 × 30 =
  31. 31.35 × 10 =
  32. 32.55 × 36 =
  33. 33.55 × 24 =
  34. 34.34 × 25 =
  35. 35.35 × 28 =
  36. 36.55 × 18 =
  37. 37.45 × 28 =
  38. 38.8 × 45 =
  39. 39.8 × 125 =
  40. 40.125 × 24 =

Answer key

  1. 900
  2. 1950
  3. 2340
  4. 1540
  5. 150
  6. 3000
  7. 770
  8. 1170
  9. 1000
  10. 720
  11. 1210
  12. 2200
  13. 480
  14. 1350
  15. 2400
  16. 3000
  17. 510
  18. 750
  19. 240
  20. 2090
  21. 440
  22. 900
  23. 1980
  24. 1260
  25. 570
  26. 200
  27. 2080
  28. 1250
  29. 1540
  30. 2250
  31. 350
  32. 1980
  33. 1320
  34. 850
  35. 980
  36. 990
  37. 1260
  38. 360
  39. 1000
  40. 3000

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