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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 591 · 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. 1.20 × 15 =
  2. 2.26 × 75 =
  3. 3.12 × 15 =
  4. 4.45 × 8 =
  5. 5.75 × 36 =
  6. 6.65 × 12 =
  7. 7.35 × 34 =
  8. 8.34 × 35 =
  9. 9.125 × 24 =
  10. 10.45 × 36 =
  11. 11.38 × 55 =
  12. 12.10 × 45 =
  13. 13.75 × 30 =
  14. 14.38 × 65 =
  15. 15.35 × 16 =
  16. 16.12 × 125 =
  17. 17.15 × 30 =
  18. 18.18 × 15 =
  19. 19.6 × 35 =
  20. 20.125 × 38 =
  21. 21.36 × 15 =
  22. 22.75 × 26 =
  23. 23.25 × 10 =
  24. 24.75 × 38 =
  25. 25.65 × 24 =
  26. 26.28 × 35 =
  27. 27.45 × 12 =
  28. 28.15 × 20 =
  29. 29.20 × 55 =
  30. 30.22 × 75 =
  31. 31.14 × 45 =
  32. 32.45 × 36 =
  33. 33.35 × 12 =
  34. 34.75 × 32 =
  35. 35.55 × 20 =
  36. 36.75 × 20 =
  37. 37.65 × 10 =
  38. 38.45 × 24 =
  39. 39.36 × 125 =
  40. 40.40 × 65 =

Answer key

  1. 300
  2. 1950
  3. 180
  4. 360
  5. 2700
  6. 780
  7. 1190
  8. 1190
  9. 3000
  10. 1620
  11. 2090
  12. 450
  13. 2250
  14. 2470
  15. 560
  16. 1500
  17. 450
  18. 270
  19. 210
  20. 4750
  21. 540
  22. 1950
  23. 250
  24. 2850
  25. 1560
  26. 980
  27. 540
  28. 300
  29. 1100
  30. 1650
  31. 630
  32. 1620
  33. 420
  34. 2400
  35. 1100
  36. 1500
  37. 650
  38. 1080
  39. 4500
  40. 2600

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