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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 430 · 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 × 16 =
  2. 2.15 × 22 =
  3. 3.55 × 34 =
  4. 4.35 × 30 =
  5. 5.36 × 55 =
  6. 6.125 × 32 =
  7. 7.25 × 16 =
  8. 8.25 × 24 =
  9. 9.65 × 8 =
  10. 10.22 × 125 =
  11. 11.25 × 14 =
  12. 12.35 × 40 =
  13. 13.26 × 75 =
  14. 14.14 × 65 =
  15. 15.38 × 55 =
  16. 16.55 × 38 =
  17. 17.35 × 24 =
  18. 18.18 × 55 =
  19. 19.30 × 55 =
  20. 20.25 × 16 =
  21. 21.125 × 24 =
  22. 22.26 × 15 =
  23. 23.15 × 10 =
  24. 24.14 × 45 =
  25. 25.25 × 26 =
  26. 26.18 × 25 =
  27. 27.65 × 38 =
  28. 28.30 × 125 =
  29. 29.32 × 15 =
  30. 30.28 × 75 =
  31. 31.35 × 26 =
  32. 32.40 × 55 =
  33. 33.25 × 22 =
  34. 34.15 × 38 =
  35. 35.40 × 125 =
  36. 36.8 × 45 =
  37. 37.45 × 16 =
  38. 38.25 × 22 =
  39. 39.55 × 32 =
  40. 40.40 × 75 =

Answer key

  1. 240
  2. 330
  3. 1870
  4. 1050
  5. 1980
  6. 4000
  7. 400
  8. 600
  9. 520
  10. 2750
  11. 350
  12. 1400
  13. 1950
  14. 910
  15. 2090
  16. 2090
  17. 840
  18. 990
  19. 1650
  20. 400
  21. 3000
  22. 390
  23. 150
  24. 630
  25. 650
  26. 450
  27. 2470
  28. 3750
  29. 480
  30. 2100
  31. 910
  32. 2200
  33. 550
  34. 570
  35. 5000
  36. 360
  37. 720
  38. 550
  39. 1760
  40. 3000

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