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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 574 · 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. 2.12 × 35 =
  3. 3.75 × 20 =
  4. 4.25 × 8 =
  5. 5.28 × 45 =
  6. 6.65 × 32 =
  7. 7.55 × 34 =
  8. 8.45 × 6 =
  9. 9.34 × 15 =
  10. 10.15 × 30 =
  11. 11.35 × 14 =
  12. 12.18 × 25 =
  13. 13.65 × 18 =
  14. 14.55 × 26 =
  15. 15.24 × 35 =
  16. 16.75 × 24 =
  17. 17.24 × 15 =
  18. 18.15 × 14 =
  19. 19.16 × 45 =
  20. 20.18 × 125 =
  21. 21.55 × 36 =
  22. 22.24 × 25 =
  23. 23.30 × 65 =
  24. 24.40 × 25 =
  25. 25.36 × 15 =
  26. 26.6 × 125 =
  27. 27.28 × 125 =
  28. 28.125 × 10 =
  29. 29.40 × 75 =
  30. 30.25 × 26 =
  31. 31.65 × 12 =
  32. 32.28 × 15 =
  33. 33.55 × 18 =
  34. 34.14 × 15 =
  35. 35.32 × 75 =
  36. 36.36 × 65 =
  37. 37.125 × 30 =
  38. 38.75 × 26 =
  39. 39.65 × 30 =
  40. 40.24 × 25 =

Answer key

  1. 150
  2. 420
  3. 1500
  4. 200
  5. 1260
  6. 2080
  7. 1870
  8. 270
  9. 510
  10. 450
  11. 490
  12. 450
  13. 1170
  14. 1430
  15. 840
  16. 1800
  17. 360
  18. 210
  19. 720
  20. 2250
  21. 1980
  22. 600
  23. 1950
  24. 1000
  25. 540
  26. 750
  27. 3500
  28. 1250
  29. 3000
  30. 650
  31. 780
  32. 420
  33. 990
  34. 210
  35. 2400
  36. 2340
  37. 3750
  38. 1950
  39. 1950
  40. 600

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