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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 806 · 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. 1.12 × 75 =
  2. 2.14 × 125 =
  3. 3.75 × 32 =
  4. 4.10 × 45 =
  5. 5.26 × 15 =
  6. 6.12 × 125 =
  7. 7.55 × 8 =
  8. 8.36 × 125 =
  9. 9.15 × 38 =
  10. 10.36 × 45 =
  11. 11.8 × 75 =
  12. 12.65 × 6 =
  13. 13.55 × 26 =
  14. 14.6 × 125 =
  15. 15.65 × 38 =
  16. 16.15 × 30 =
  17. 17.35 × 28 =
  18. 18.125 × 6 =
  19. 19.65 × 14 =
  20. 20.35 × 14 =
  21. 21.125 × 12 =
  22. 22.75 × 14 =
  23. 23.75 × 28 =
  24. 24.125 × 28 =
  25. 25.12 × 55 =
  26. 26.25 × 32 =
  27. 27.14 × 55 =
  28. 28.15 × 18 =
  29. 29.55 × 22 =
  30. 30.125 × 6 =
  31. 31.45 × 10 =
  32. 32.25 × 40 =
  33. 33.30 × 15 =
  34. 34.35 × 24 =
  35. 35.35 × 30 =
  36. 36.45 × 26 =
  37. 37.25 × 36 =
  38. 38.35 × 32 =
  39. 39.16 × 55 =
  40. 40.35 × 28 =

Answer key

  1. 900
  2. 1750
  3. 2400
  4. 450
  5. 390
  6. 1500
  7. 440
  8. 4500
  9. 570
  10. 1620
  11. 600
  12. 390
  13. 1430
  14. 750
  15. 2470
  16. 450
  17. 980
  18. 750
  19. 910
  20. 490
  21. 1500
  22. 1050
  23. 2100
  24. 3500
  25. 660
  26. 800
  27. 770
  28. 270
  29. 1210
  30. 750
  31. 450
  32. 1000
  33. 450
  34. 840
  35. 1050
  36. 1170
  37. 900
  38. 1120
  39. 880
  40. 980

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