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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 974 · 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. 1.38 × 45 =
  2. 2.35 × 10 =
  3. 3.22 × 65 =
  4. 4.28 × 125 =
  5. 5.15 × 34 =
  6. 6.65 × 36 =
  7. 7.15 × 6 =
  8. 8.22 × 55 =
  9. 9.12 × 25 =
  10. 10.15 × 24 =
  11. 11.55 × 40 =
  12. 12.45 × 30 =
  13. 13.55 × 14 =
  14. 14.8 × 15 =
  15. 15.20 × 25 =
  16. 16.40 × 15 =
  17. 17.26 × 75 =
  18. 18.45 × 32 =
  19. 19.35 × 10 =
  20. 20.15 × 20 =
  21. 21.25 × 18 =
  22. 22.25 × 12 =
  23. 23.34 × 15 =
  24. 24.26 × 15 =
  25. 25.18 × 45 =
  26. 26.28 × 35 =
  27. 27.6 × 65 =
  28. 28.30 × 75 =
  29. 29.45 × 22 =
  30. 30.75 × 22 =
  31. 31.45 × 8 =
  32. 32.125 × 6 =
  33. 33.14 × 125 =
  34. 34.55 × 32 =
  35. 35.25 × 32 =
  36. 36.12 × 75 =
  37. 37.6 × 75 =
  38. 38.15 × 14 =
  39. 39.125 × 28 =
  40. 40.25 × 36 =

Answer key

  1. 1710
  2. 350
  3. 1430
  4. 3500
  5. 510
  6. 2340
  7. 90
  8. 1210
  9. 300
  10. 360
  11. 2200
  12. 1350
  13. 770
  14. 120
  15. 500
  16. 600
  17. 1950
  18. 1440
  19. 350
  20. 300
  21. 450
  22. 300
  23. 510
  24. 390
  25. 810
  26. 980
  27. 390
  28. 2250
  29. 990
  30. 1650
  31. 360
  32. 750
  33. 1750
  34. 1760
  35. 800
  36. 900
  37. 450
  38. 210
  39. 3500
  40. 900

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