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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 70 · 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 × 12 =
  2. 2.40 × 35 =
  3. 3.45 × 12 =
  4. 4.35 × 24 =
  5. 5.15 × 16 =
  6. 6.55 × 28 =
  7. 7.10 × 45 =
  8. 8.14 × 55 =
  9. 9.16 × 65 =
  10. 10.15 × 22 =
  11. 11.75 × 28 =
  12. 12.125 × 30 =
  13. 13.45 × 22 =
  14. 14.10 × 55 =
  15. 15.10 × 125 =
  16. 16.36 × 45 =
  17. 17.25 × 16 =
  18. 18.25 × 18 =
  19. 19.125 × 30 =
  20. 20.65 × 38 =
  21. 21.35 × 20 =
  22. 22.38 × 25 =
  23. 23.18 × 75 =
  24. 24.55 × 36 =
  25. 25.25 × 28 =
  26. 26.14 × 125 =
  27. 27.125 × 18 =
  28. 28.34 × 55 =
  29. 29.25 × 26 =
  30. 30.14 × 25 =
  31. 31.22 × 35 =
  32. 32.125 × 8 =
  33. 33.8 × 125 =
  34. 34.45 × 12 =
  35. 35.25 × 8 =
  36. 36.125 × 38 =
  37. 37.45 × 32 =
  38. 38.6 × 25 =
  39. 39.40 × 25 =
  40. 40.12 × 55 =

Answer key

  1. 300
  2. 1400
  3. 540
  4. 840
  5. 240
  6. 1540
  7. 450
  8. 770
  9. 1040
  10. 330
  11. 2100
  12. 3750
  13. 990
  14. 550
  15. 1250
  16. 1620
  17. 400
  18. 450
  19. 3750
  20. 2470
  21. 700
  22. 950
  23. 1350
  24. 1980
  25. 700
  26. 1750
  27. 2250
  28. 1870
  29. 650
  30. 350
  31. 770
  32. 1000
  33. 1000
  34. 540
  35. 200
  36. 4750
  37. 1440
  38. 150
  39. 1000
  40. 660

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