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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 672 · 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. 1.32 × 75 =
  2. 2.35 × 38 =
  3. 3.15 × 34 =
  4. 4.38 × 45 =
  5. 5.24 × 75 =
  6. 6.14 × 15 =
  7. 7.25 × 22 =
  8. 8.24 × 65 =
  9. 9.8 × 45 =
  10. 10.25 × 32 =
  11. 11.35 × 30 =
  12. 12.25 × 10 =
  13. 13.35 × 36 =
  14. 14.10 × 15 =
  15. 15.65 × 36 =
  16. 16.38 × 65 =
  17. 17.10 × 55 =
  18. 18.16 × 125 =
  19. 19.25 × 10 =
  20. 20.125 × 36 =
  21. 21.8 × 15 =
  22. 22.14 × 25 =
  23. 23.26 × 35 =
  24. 24.8 × 35 =
  25. 25.45 × 40 =
  26. 26.24 × 45 =
  27. 27.25 × 20 =
  28. 28.65 × 10 =
  29. 29.75 × 12 =
  30. 30.75 × 38 =
  31. 31.65 × 8 =
  32. 32.30 × 75 =
  33. 33.35 × 34 =
  34. 34.20 × 35 =
  35. 35.15 × 28 =
  36. 36.75 × 38 =
  37. 37.75 × 20 =
  38. 38.55 × 24 =
  39. 39.125 × 28 =
  40. 40.35 × 24 =

Answer key

  1. 2400
  2. 1330
  3. 510
  4. 1710
  5. 1800
  6. 210
  7. 550
  8. 1560
  9. 360
  10. 800
  11. 1050
  12. 250
  13. 1260
  14. 150
  15. 2340
  16. 2470
  17. 550
  18. 2000
  19. 250
  20. 4500
  21. 120
  22. 350
  23. 910
  24. 280
  25. 1800
  26. 1080
  27. 500
  28. 650
  29. 900
  30. 2850
  31. 520
  32. 2250
  33. 1190
  34. 700
  35. 420
  36. 2850
  37. 1500
  38. 1320
  39. 3500
  40. 840

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