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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 492 · 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. 1.65 × 30 =
  2. 2.15 × 20 =
  3. 3.34 × 45 =
  4. 4.20 × 45 =
  5. 5.25 × 30 =
  6. 6.55 × 38 =
  7. 7.65 × 6 =
  8. 8.14 × 25 =
  9. 9.45 × 10 =
  10. 10.125 × 40 =
  11. 11.75 × 14 =
  12. 12.35 × 22 =
  13. 13.45 × 40 =
  14. 14.22 × 25 =
  15. 15.125 × 6 =
  16. 16.25 × 24 =
  17. 17.35 × 8 =
  18. 18.15 × 40 =
  19. 19.55 × 12 =
  20. 20.12 × 15 =
  21. 21.25 × 16 =
  22. 22.40 × 45 =
  23. 23.22 × 15 =
  24. 24.25 × 18 =
  25. 25.45 × 20 =
  26. 26.38 × 65 =
  27. 27.24 × 35 =
  28. 28.125 × 8 =
  29. 29.20 × 45 =
  30. 30.16 × 35 =
  31. 31.15 × 32 =
  32. 32.12 × 65 =
  33. 33.12 × 45 =
  34. 34.75 × 10 =
  35. 35.15 × 36 =
  36. 36.14 × 125 =
  37. 37.6 × 45 =
  38. 38.40 × 125 =
  39. 39.55 × 12 =
  40. 40.25 × 40 =

Answer key

  1. 1950
  2. 300
  3. 1530
  4. 900
  5. 750
  6. 2090
  7. 390
  8. 350
  9. 450
  10. 5000
  11. 1050
  12. 770
  13. 1800
  14. 550
  15. 750
  16. 600
  17. 280
  18. 600
  19. 660
  20. 180
  21. 400
  22. 1800
  23. 330
  24. 450
  25. 900
  26. 2470
  27. 840
  28. 1000
  29. 900
  30. 560
  31. 480
  32. 780
  33. 540
  34. 750
  35. 540
  36. 1750
  37. 270
  38. 5000
  39. 660
  40. 1000

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