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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 897 · 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. 1.30 × 125 =
  2. 2.30 × 15 =
  3. 3.125 × 34 =
  4. 4.38 × 45 =
  5. 5.6 × 25 =
  6. 6.38 × 55 =
  7. 7.20 × 55 =
  8. 8.15 × 8 =
  9. 9.30 × 65 =
  10. 10.75 × 10 =
  11. 11.34 × 35 =
  12. 12.125 × 6 =
  13. 13.125 × 22 =
  14. 14.12 × 125 =
  15. 15.26 × 25 =
  16. 16.55 × 36 =
  17. 17.25 × 14 =
  18. 18.25 × 40 =
  19. 19.125 × 8 =
  20. 20.65 × 36 =
  21. 21.25 × 40 =
  22. 22.16 × 125 =
  23. 23.14 × 65 =
  24. 24.35 × 30 =
  25. 25.65 × 8 =
  26. 26.20 × 25 =
  27. 27.12 × 45 =
  28. 28.36 × 55 =
  29. 29.35 × 32 =
  30. 30.26 × 65 =
  31. 31.10 × 55 =
  32. 32.40 × 35 =
  33. 33.35 × 30 =
  34. 34.75 × 40 =
  35. 35.25 × 36 =
  36. 36.20 × 15 =
  37. 37.45 × 38 =
  38. 38.40 × 55 =
  39. 39.10 × 75 =
  40. 40.55 × 10 =

Answer key

  1. 3750
  2. 450
  3. 4250
  4. 1710
  5. 150
  6. 2090
  7. 1100
  8. 120
  9. 1950
  10. 750
  11. 1190
  12. 750
  13. 2750
  14. 1500
  15. 650
  16. 1980
  17. 350
  18. 1000
  19. 1000
  20. 2340
  21. 1000
  22. 2000
  23. 910
  24. 1050
  25. 520
  26. 500
  27. 540
  28. 1980
  29. 1120
  30. 1690
  31. 550
  32. 1400
  33. 1050
  34. 3000
  35. 900
  36. 300
  37. 1710
  38. 2200
  39. 750
  40. 550

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