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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 11 · 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. 1.22 × 65 =
  2. 2.40 × 15 =
  3. 3.65 × 24 =
  4. 4.25 × 32 =
  5. 5.30 × 25 =
  6. 6.65 × 38 =
  7. 7.25 × 8 =
  8. 8.55 × 38 =
  9. 9.18 × 45 =
  10. 10.6 × 75 =
  11. 11.55 × 30 =
  12. 12.65 × 6 =
  13. 13.75 × 20 =
  14. 14.40 × 55 =
  15. 15.125 × 10 =
  16. 16.65 × 40 =
  17. 17.10 × 125 =
  18. 18.65 × 30 =
  19. 19.35 × 24 =
  20. 20.25 × 12 =
  21. 21.14 × 25 =
  22. 22.125 × 32 =
  23. 23.36 × 55 =
  24. 24.24 × 45 =
  25. 25.18 × 25 =
  26. 26.25 × 16 =
  27. 27.65 × 10 =
  28. 28.75 × 20 =
  29. 29.38 × 35 =
  30. 30.34 × 55 =
  31. 31.25 × 24 =
  32. 32.65 × 18 =
  33. 33.75 × 40 =
  34. 34.25 × 34 =
  35. 35.75 × 24 =
  36. 36.38 × 15 =
  37. 37.55 × 32 =
  38. 38.14 × 65 =
  39. 39.10 × 55 =
  40. 40.26 × 65 =

Answer key

  1. 1430
  2. 600
  3. 1560
  4. 800
  5. 750
  6. 2470
  7. 200
  8. 2090
  9. 810
  10. 450
  11. 1650
  12. 390
  13. 1500
  14. 2200
  15. 1250
  16. 2600
  17. 1250
  18. 1950
  19. 840
  20. 300
  21. 350
  22. 4000
  23. 1980
  24. 1080
  25. 450
  26. 400
  27. 650
  28. 1500
  29. 1330
  30. 1870
  31. 600
  32. 1170
  33. 3000
  34. 850
  35. 1800
  36. 570
  37. 1760
  38. 910
  39. 550
  40. 1690

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