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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 712 · 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. 1.8 × 75 =
  2. 2.30 × 75 =
  3. 3.20 × 75 =
  4. 4.14 × 75 =
  5. 5.35 × 24 =
  6. 6.75 × 36 =
  7. 7.25 × 24 =
  8. 8.15 × 40 =
  9. 9.25 × 38 =
  10. 10.45 × 18 =
  11. 11.75 × 18 =
  12. 12.125 × 16 =
  13. 13.20 × 25 =
  14. 14.75 × 26 =
  15. 15.35 × 20 =
  16. 16.28 × 45 =
  17. 17.45 × 14 =
  18. 18.75 × 10 =
  19. 19.12 × 35 =
  20. 20.55 × 36 =
  21. 21.15 × 12 =
  22. 22.75 × 26 =
  23. 23.38 × 35 =
  24. 24.125 × 6 =
  25. 25.36 × 65 =
  26. 26.65 × 10 =
  27. 27.40 × 25 =
  28. 28.16 × 45 =
  29. 29.32 × 35 =
  30. 30.34 × 15 =
  31. 31.12 × 35 =
  32. 32.15 × 10 =
  33. 33.125 × 14 =
  34. 34.125 × 12 =
  35. 35.40 × 75 =
  36. 36.55 × 24 =
  37. 37.75 × 20 =
  38. 38.8 × 45 =
  39. 39.14 × 125 =
  40. 40.26 × 75 =

Answer key

  1. 600
  2. 2250
  3. 1500
  4. 1050
  5. 840
  6. 2700
  7. 600
  8. 600
  9. 950
  10. 810
  11. 1350
  12. 2000
  13. 500
  14. 1950
  15. 700
  16. 1260
  17. 630
  18. 750
  19. 420
  20. 1980
  21. 180
  22. 1950
  23. 1330
  24. 750
  25. 2340
  26. 650
  27. 1000
  28. 720
  29. 1120
  30. 510
  31. 420
  32. 150
  33. 1750
  34. 1500
  35. 3000
  36. 1320
  37. 1500
  38. 360
  39. 1750
  40. 1950

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