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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 501 · 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. 1.35 × 40 =
  2. 2.26 × 15 =
  3. 3.32 × 15 =
  4. 4.125 × 12 =
  5. 5.24 × 35 =
  6. 6.15 × 10 =
  7. 7.15 × 6 =
  8. 8.18 × 55 =
  9. 9.8 × 15 =
  10. 10.12 × 25 =
  11. 11.35 × 8 =
  12. 12.12 × 45 =
  13. 13.25 × 20 =
  14. 14.75 × 20 =
  15. 15.125 × 6 =
  16. 16.65 × 6 =
  17. 17.65 × 36 =
  18. 18.12 × 75 =
  19. 19.75 × 6 =
  20. 20.65 × 6 =
  21. 21.28 × 35 =
  22. 22.25 × 38 =
  23. 23.14 × 65 =
  24. 24.125 × 40 =
  25. 25.38 × 35 =
  26. 26.125 × 12 =
  27. 27.38 × 75 =
  28. 28.45 × 20 =
  29. 29.45 × 6 =
  30. 30.32 × 75 =
  31. 31.75 × 24 =
  32. 32.125 × 12 =
  33. 33.45 × 24 =
  34. 34.65 × 30 =
  35. 35.26 × 125 =
  36. 36.22 × 125 =
  37. 37.35 × 40 =
  38. 38.65 × 40 =
  39. 39.65 × 6 =
  40. 40.32 × 55 =

Answer key

  1. 1400
  2. 390
  3. 480
  4. 1500
  5. 840
  6. 150
  7. 90
  8. 990
  9. 120
  10. 300
  11. 280
  12. 540
  13. 500
  14. 1500
  15. 750
  16. 390
  17. 2340
  18. 900
  19. 450
  20. 390
  21. 980
  22. 950
  23. 910
  24. 5000
  25. 1330
  26. 1500
  27. 2850
  28. 900
  29. 270
  30. 2400
  31. 1800
  32. 1500
  33. 1080
  34. 1950
  35. 3250
  36. 2750
  37. 1400
  38. 2600
  39. 390
  40. 1760

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