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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 32 · 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. 1.26 × 55 =
  2. 2.45 × 16 =
  3. 3.125 × 40 =
  4. 4.30 × 25 =
  5. 5.22 × 65 =
  6. 6.65 × 10 =
  7. 7.15 × 16 =
  8. 8.12 × 45 =
  9. 9.26 × 45 =
  10. 10.40 × 65 =
  11. 11.25 × 14 =
  12. 12.75 × 14 =
  13. 13.26 × 35 =
  14. 14.75 × 18 =
  15. 15.6 × 65 =
  16. 16.65 × 34 =
  17. 17.65 × 18 =
  18. 18.6 × 75 =
  19. 19.65 × 18 =
  20. 20.15 × 8 =
  21. 21.12 × 15 =
  22. 22.10 × 65 =
  23. 23.125 × 36 =
  24. 24.6 × 25 =
  25. 25.14 × 25 =
  26. 26.36 × 25 =
  27. 27.65 × 12 =
  28. 28.15 × 24 =
  29. 29.32 × 35 =
  30. 30.36 × 35 =
  31. 31.15 × 28 =
  32. 32.65 × 28 =
  33. 33.36 × 25 =
  34. 34.35 × 22 =
  35. 35.25 × 10 =
  36. 36.45 × 12 =
  37. 37.22 × 75 =
  38. 38.24 × 125 =
  39. 39.35 × 6 =
  40. 40.24 × 15 =

Answer key

  1. 1430
  2. 720
  3. 5000
  4. 750
  5. 1430
  6. 650
  7. 240
  8. 540
  9. 1170
  10. 2600
  11. 350
  12. 1050
  13. 910
  14. 1350
  15. 390
  16. 2210
  17. 1170
  18. 450
  19. 1170
  20. 120
  21. 180
  22. 650
  23. 4500
  24. 150
  25. 350
  26. 900
  27. 780
  28. 360
  29. 1120
  30. 1260
  31. 420
  32. 1820
  33. 900
  34. 770
  35. 250
  36. 540
  37. 1650
  38. 3000
  39. 210
  40. 360

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