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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 642 · 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 × 28 =
  2. 2.30 × 125 =
  3. 3.35 × 22 =
  4. 4.10 × 15 =
  5. 5.24 × 35 =
  6. 6.45 × 8 =
  7. 7.10 × 75 =
  8. 8.10 × 55 =
  9. 9.35 × 38 =
  10. 10.55 × 34 =
  11. 11.14 × 25 =
  12. 12.45 × 20 =
  13. 13.32 × 45 =
  14. 14.65 × 30 =
  15. 15.34 × 35 =
  16. 16.24 × 65 =
  17. 17.18 × 75 =
  18. 18.125 × 14 =
  19. 19.15 × 10 =
  20. 20.45 × 20 =
  21. 21.25 × 28 =
  22. 22.125 × 26 =
  23. 23.65 × 36 =
  24. 24.14 × 15 =
  25. 25.38 × 45 =
  26. 26.35 × 8 =
  27. 27.25 × 16 =
  28. 28.26 × 125 =
  29. 29.24 × 65 =
  30. 30.125 × 10 =
  31. 31.75 × 28 =
  32. 32.20 × 65 =
  33. 33.75 × 28 =
  34. 34.55 × 16 =
  35. 35.6 × 75 =
  36. 36.25 × 12 =
  37. 37.65 × 22 =
  38. 38.15 × 36 =
  39. 39.35 × 22 =
  40. 40.16 × 35 =

Answer key

  1. 980
  2. 3750
  3. 770
  4. 150
  5. 840
  6. 360
  7. 750
  8. 550
  9. 1330
  10. 1870
  11. 350
  12. 900
  13. 1440
  14. 1950
  15. 1190
  16. 1560
  17. 1350
  18. 1750
  19. 150
  20. 900
  21. 700
  22. 3250
  23. 2340
  24. 210
  25. 1710
  26. 280
  27. 400
  28. 3250
  29. 1560
  30. 1250
  31. 2100
  32. 1300
  33. 2100
  34. 880
  35. 450
  36. 300
  37. 1430
  38. 540
  39. 770
  40. 560

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