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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 298 · 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. 1.10 × 25 =
  2. 2.22 × 125 =
  3. 3.32 × 15 =
  4. 4.6 × 55 =
  5. 5.18 × 25 =
  6. 6.15 × 28 =
  7. 7.26 × 25 =
  8. 8.35 × 12 =
  9. 9.45 × 40 =
  10. 10.10 × 35 =
  11. 11.20 × 55 =
  12. 12.38 × 125 =
  13. 13.65 × 12 =
  14. 14.125 × 26 =
  15. 15.10 × 45 =
  16. 16.20 × 25 =
  17. 17.35 × 18 =
  18. 18.35 × 28 =
  19. 19.35 × 28 =
  20. 20.38 × 125 =
  21. 21.35 × 16 =
  22. 22.25 × 40 =
  23. 23.55 × 24 =
  24. 24.35 × 36 =
  25. 25.35 × 36 =
  26. 26.25 × 22 =
  27. 27.14 × 45 =
  28. 28.15 × 14 =
  29. 29.24 × 25 =
  30. 30.35 × 10 =
  31. 31.28 × 55 =
  32. 32.45 × 14 =
  33. 33.55 × 38 =
  34. 34.10 × 55 =
  35. 35.15 × 12 =
  36. 36.34 × 65 =
  37. 37.65 × 22 =
  38. 38.75 × 30 =
  39. 39.36 × 45 =
  40. 40.38 × 15 =

Answer key

  1. 250
  2. 2750
  3. 480
  4. 330
  5. 450
  6. 420
  7. 650
  8. 420
  9. 1800
  10. 350
  11. 1100
  12. 4750
  13. 780
  14. 3250
  15. 450
  16. 500
  17. 630
  18. 980
  19. 980
  20. 4750
  21. 560
  22. 1000
  23. 1320
  24. 1260
  25. 1260
  26. 550
  27. 630
  28. 210
  29. 600
  30. 350
  31. 1540
  32. 630
  33. 2090
  34. 550
  35. 180
  36. 2210
  37. 1430
  38. 2250
  39. 1620
  40. 570

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