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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 637 · 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. 1.45 × 16 =
  2. 2.25 × 34 =
  3. 3.40 × 125 =
  4. 4.24 × 35 =
  5. 5.36 × 45 =
  6. 6.25 × 12 =
  7. 7.45 × 8 =
  8. 8.15 × 26 =
  9. 9.36 × 65 =
  10. 10.45 × 6 =
  11. 11.55 × 34 =
  12. 12.45 × 40 =
  13. 13.65 × 6 =
  14. 14.16 × 25 =
  15. 15.6 × 15 =
  16. 16.125 × 38 =
  17. 17.35 × 12 =
  18. 18.65 × 40 =
  19. 19.15 × 34 =
  20. 20.16 × 125 =
  21. 21.35 × 8 =
  22. 22.25 × 8 =
  23. 23.25 × 12 =
  24. 24.14 × 65 =
  25. 25.45 × 28 =
  26. 26.34 × 75 =
  27. 27.28 × 25 =
  28. 28.45 × 20 =
  29. 29.28 × 35 =
  30. 30.22 × 25 =
  31. 31.32 × 15 =
  32. 32.6 × 35 =
  33. 33.12 × 25 =
  34. 34.55 × 22 =
  35. 35.75 × 10 =
  36. 36.14 × 25 =
  37. 37.16 × 35 =
  38. 38.26 × 15 =
  39. 39.55 × 24 =
  40. 40.65 × 28 =

Answer key

  1. 720
  2. 850
  3. 5000
  4. 840
  5. 1620
  6. 300
  7. 360
  8. 390
  9. 2340
  10. 270
  11. 1870
  12. 1800
  13. 390
  14. 400
  15. 90
  16. 4750
  17. 420
  18. 2600
  19. 510
  20. 2000
  21. 280
  22. 200
  23. 300
  24. 910
  25. 1260
  26. 2550
  27. 700
  28. 900
  29. 980
  30. 550
  31. 480
  32. 210
  33. 300
  34. 1210
  35. 750
  36. 350
  37. 560
  38. 390
  39. 1320
  40. 1820

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