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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 99 · 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 × 24 =
  2. 2.24 × 15 =
  3. 3.40 × 25 =
  4. 4.10 × 15 =
  5. 5.18 × 45 =
  6. 6.26 × 15 =
  7. 7.45 × 12 =
  8. 8.34 × 75 =
  9. 9.24 × 25 =
  10. 10.35 × 14 =
  11. 11.125 × 14 =
  12. 12.14 × 75 =
  13. 13.35 × 22 =
  14. 14.75 × 12 =
  15. 15.24 × 65 =
  16. 16.55 × 28 =
  17. 17.55 × 10 =
  18. 18.45 × 18 =
  19. 19.15 × 32 =
  20. 20.30 × 15 =
  21. 21.75 × 38 =
  22. 22.35 × 16 =
  23. 23.6 × 25 =
  24. 24.65 × 30 =
  25. 25.75 × 38 =
  26. 26.15 × 40 =
  27. 27.125 × 24 =
  28. 28.36 × 25 =
  29. 29.55 × 12 =
  30. 30.15 × 38 =
  31. 31.20 × 45 =
  32. 32.35 × 12 =
  33. 33.55 × 12 =
  34. 34.15 × 34 =
  35. 35.40 × 65 =
  36. 36.38 × 45 =
  37. 37.16 × 25 =
  38. 38.45 × 28 =
  39. 39.15 × 8 =
  40. 40.38 × 55 =

Answer key

  1. 600
  2. 360
  3. 1000
  4. 150
  5. 810
  6. 390
  7. 540
  8. 2550
  9. 600
  10. 490
  11. 1750
  12. 1050
  13. 770
  14. 900
  15. 1560
  16. 1540
  17. 550
  18. 810
  19. 480
  20. 450
  21. 2850
  22. 560
  23. 150
  24. 1950
  25. 2850
  26. 600
  27. 3000
  28. 900
  29. 660
  30. 570
  31. 900
  32. 420
  33. 660
  34. 510
  35. 2600
  36. 1710
  37. 400
  38. 1260
  39. 120
  40. 2090

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