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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 131 · 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. 1.125 × 8 =
  2. 2.45 × 36 =
  3. 3.34 × 15 =
  4. 4.35 × 40 =
  5. 5.125 × 24 =
  6. 6.15 × 10 =
  7. 7.28 × 75 =
  8. 8.25 × 38 =
  9. 9.55 × 6 =
  10. 10.38 × 15 =
  11. 11.6 × 15 =
  12. 12.125 × 32 =
  13. 13.65 × 32 =
  14. 14.25 × 34 =
  15. 15.45 × 10 =
  16. 16.15 × 32 =
  17. 17.18 × 65 =
  18. 18.55 × 6 =
  19. 19.35 × 26 =
  20. 20.24 × 45 =
  21. 21.26 × 55 =
  22. 22.15 × 24 =
  23. 23.35 × 32 =
  24. 24.6 × 35 =
  25. 25.25 × 10 =
  26. 26.45 × 36 =
  27. 27.34 × 15 =
  28. 28.28 × 45 =
  29. 29.24 × 25 =
  30. 30.26 × 125 =
  31. 31.22 × 25 =
  32. 32.15 × 36 =
  33. 33.125 × 26 =
  34. 34.15 × 34 =
  35. 35.15 × 6 =
  36. 36.75 × 14 =
  37. 37.75 × 26 =
  38. 38.55 × 18 =
  39. 39.36 × 25 =
  40. 40.25 × 34 =

Answer key

  1. 1000
  2. 1620
  3. 510
  4. 1400
  5. 3000
  6. 150
  7. 2100
  8. 950
  9. 330
  10. 570
  11. 90
  12. 4000
  13. 2080
  14. 850
  15. 450
  16. 480
  17. 1170
  18. 330
  19. 910
  20. 1080
  21. 1430
  22. 360
  23. 1120
  24. 210
  25. 250
  26. 1620
  27. 510
  28. 1260
  29. 600
  30. 3250
  31. 550
  32. 540
  33. 3250
  34. 510
  35. 90
  36. 1050
  37. 1950
  38. 990
  39. 900
  40. 850

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