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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 549 · 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. 1.25 × 34 =
  2. 2.45 × 12 =
  3. 3.12 × 125 =
  4. 4.75 × 16 =
  5. 5.35 × 14 =
  6. 6.34 × 65 =
  7. 7.12 × 25 =
  8. 8.25 × 26 =
  9. 9.38 × 75 =
  10. 10.10 × 45 =
  11. 11.125 × 6 =
  12. 12.30 × 45 =
  13. 13.75 × 12 =
  14. 14.22 × 55 =
  15. 15.15 × 28 =
  16. 16.35 × 10 =
  17. 17.25 × 34 =
  18. 18.15 × 18 =
  19. 19.8 × 15 =
  20. 20.15 × 26 =
  21. 21.34 × 25 =
  22. 22.16 × 25 =
  23. 23.40 × 125 =
  24. 24.35 × 26 =
  25. 25.24 × 25 =
  26. 26.15 × 6 =
  27. 27.30 × 65 =
  28. 28.25 × 28 =
  29. 29.18 × 55 =
  30. 30.10 × 15 =
  31. 31.34 × 65 =
  32. 32.75 × 40 =
  33. 33.125 × 32 =
  34. 34.36 × 125 =
  35. 35.12 × 25 =
  36. 36.125 × 38 =
  37. 37.35 × 32 =
  38. 38.15 × 10 =
  39. 39.12 × 125 =
  40. 40.125 × 14 =

Answer key

  1. 850
  2. 540
  3. 1500
  4. 1200
  5. 490
  6. 2210
  7. 300
  8. 650
  9. 2850
  10. 450
  11. 750
  12. 1350
  13. 900
  14. 1210
  15. 420
  16. 350
  17. 850
  18. 270
  19. 120
  20. 390
  21. 850
  22. 400
  23. 5000
  24. 910
  25. 600
  26. 90
  27. 1950
  28. 700
  29. 990
  30. 150
  31. 2210
  32. 3000
  33. 4000
  34. 4500
  35. 300
  36. 4750
  37. 1120
  38. 150
  39. 1500
  40. 1750

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