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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 229 · 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. 1.15 × 34 =
  2. 2.22 × 25 =
  3. 3.45 × 10 =
  4. 4.35 × 8 =
  5. 5.26 × 125 =
  6. 6.26 × 15 =
  7. 7.75 × 24 =
  8. 8.75 × 12 =
  9. 9.25 × 26 =
  10. 10.8 × 125 =
  11. 11.24 × 125 =
  12. 12.55 × 10 =
  13. 13.38 × 25 =
  14. 14.34 × 65 =
  15. 15.125 × 20 =
  16. 16.20 × 125 =
  17. 17.26 × 65 =
  18. 18.12 × 15 =
  19. 19.75 × 22 =
  20. 20.25 × 32 =
  21. 21.25 × 28 =
  22. 22.22 × 55 =
  23. 23.55 × 12 =
  24. 24.40 × 15 =
  25. 25.6 × 15 =
  26. 26.8 × 45 =
  27. 27.6 × 15 =
  28. 28.16 × 25 =
  29. 29.35 × 22 =
  30. 30.22 × 25 =
  31. 31.55 × 14 =
  32. 32.12 × 25 =
  33. 33.65 × 6 =
  34. 34.65 × 24 =
  35. 35.45 × 14 =
  36. 36.55 × 38 =
  37. 37.125 × 24 =
  38. 38.25 × 38 =
  39. 39.28 × 55 =
  40. 40.45 × 38 =

Answer key

  1. 510
  2. 550
  3. 450
  4. 280
  5. 3250
  6. 390
  7. 1800
  8. 900
  9. 650
  10. 1000
  11. 3000
  12. 550
  13. 950
  14. 2210
  15. 2500
  16. 2500
  17. 1690
  18. 180
  19. 1650
  20. 800
  21. 700
  22. 1210
  23. 660
  24. 600
  25. 90
  26. 360
  27. 90
  28. 400
  29. 770
  30. 550
  31. 770
  32. 300
  33. 390
  34. 1560
  35. 630
  36. 2090
  37. 3000
  38. 950
  39. 1540
  40. 1710

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