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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 970 · 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. 1.24 × 55 =
  2. 2.14 × 55 =
  3. 3.75 × 14 =
  4. 4.10 × 15 =
  5. 5.10 × 25 =
  6. 6.36 × 15 =
  7. 7.12 × 25 =
  8. 8.22 × 15 =
  9. 9.8 × 75 =
  10. 10.15 × 20 =
  11. 11.25 × 18 =
  12. 12.65 × 28 =
  13. 13.55 × 18 =
  14. 14.40 × 25 =
  15. 15.25 × 6 =
  16. 16.24 × 15 =
  17. 17.55 × 36 =
  18. 18.10 × 35 =
  19. 19.125 × 28 =
  20. 20.22 × 55 =
  21. 21.6 × 125 =
  22. 22.25 × 20 =
  23. 23.16 × 15 =
  24. 24.55 × 6 =
  25. 25.12 × 25 =
  26. 26.125 × 22 =
  27. 27.25 × 10 =
  28. 28.34 × 35 =
  29. 29.125 × 18 =
  30. 30.25 × 8 =
  31. 31.25 × 24 =
  32. 32.65 × 12 =
  33. 33.55 × 38 =
  34. 34.26 × 15 =
  35. 35.25 × 36 =
  36. 36.75 × 40 =
  37. 37.34 × 75 =
  38. 38.8 × 25 =
  39. 39.45 × 34 =
  40. 40.20 × 35 =

Answer key

  1. 1320
  2. 770
  3. 1050
  4. 150
  5. 250
  6. 540
  7. 300
  8. 330
  9. 600
  10. 300
  11. 450
  12. 1820
  13. 990
  14. 1000
  15. 150
  16. 360
  17. 1980
  18. 350
  19. 3500
  20. 1210
  21. 750
  22. 500
  23. 240
  24. 330
  25. 300
  26. 2750
  27. 250
  28. 1190
  29. 2250
  30. 200
  31. 600
  32. 780
  33. 2090
  34. 390
  35. 900
  36. 3000
  37. 2550
  38. 200
  39. 1530
  40. 700

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