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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 733 · 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. 1.18 × 15 =
  2. 2.35 × 12 =
  3. 3.38 × 55 =
  4. 4.10 × 45 =
  5. 5.35 × 8 =
  6. 6.38 × 65 =
  7. 7.25 × 20 =
  8. 8.65 × 6 =
  9. 9.28 × 35 =
  10. 10.28 × 65 =
  11. 11.45 × 28 =
  12. 12.15 × 14 =
  13. 13.25 × 10 =
  14. 14.24 × 35 =
  15. 15.12 × 35 =
  16. 16.75 × 24 =
  17. 17.75 × 22 =
  18. 18.45 × 6 =
  19. 19.20 × 25 =
  20. 20.24 × 15 =
  21. 21.10 × 15 =
  22. 22.75 × 8 =
  23. 23.34 × 35 =
  24. 24.30 × 45 =
  25. 25.35 × 24 =
  26. 26.45 × 12 =
  27. 27.18 × 25 =
  28. 28.15 × 34 =
  29. 29.75 × 16 =
  30. 30.125 × 36 =
  31. 31.35 × 26 =
  32. 32.125 × 24 =
  33. 33.125 × 38 =
  34. 34.20 × 55 =
  35. 35.35 × 28 =
  36. 36.10 × 125 =
  37. 37.30 × 35 =
  38. 38.25 × 32 =
  39. 39.8 × 125 =
  40. 40.36 × 75 =

Answer key

  1. 270
  2. 420
  3. 2090
  4. 450
  5. 280
  6. 2470
  7. 500
  8. 390
  9. 980
  10. 1820
  11. 1260
  12. 210
  13. 250
  14. 840
  15. 420
  16. 1800
  17. 1650
  18. 270
  19. 500
  20. 360
  21. 150
  22. 600
  23. 1190
  24. 1350
  25. 840
  26. 540
  27. 450
  28. 510
  29. 1200
  30. 4500
  31. 910
  32. 3000
  33. 4750
  34. 1100
  35. 980
  36. 1250
  37. 1050
  38. 800
  39. 1000
  40. 2700

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