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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 903 · 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 × 20 =
  2. 2.125 × 20 =
  3. 3.25 × 26 =
  4. 4.34 × 55 =
  5. 5.32 × 75 =
  6. 6.32 × 65 =
  7. 7.65 × 14 =
  8. 8.35 × 18 =
  9. 9.25 × 12 =
  10. 10.36 × 35 =
  11. 11.34 × 125 =
  12. 12.16 × 55 =
  13. 13.45 × 20 =
  14. 14.8 × 15 =
  15. 15.45 × 18 =
  16. 16.32 × 15 =
  17. 17.26 × 25 =
  18. 18.32 × 35 =
  19. 19.15 × 18 =
  20. 20.16 × 125 =
  21. 21.40 × 65 =
  22. 22.8 × 35 =
  23. 23.20 × 125 =
  24. 24.125 × 32 =
  25. 25.34 × 15 =
  26. 26.35 × 18 =
  27. 27.35 × 34 =
  28. 28.35 × 16 =
  29. 29.28 × 75 =
  30. 30.12 × 55 =
  31. 31.75 × 38 =
  32. 32.125 × 26 =
  33. 33.45 × 6 =
  34. 34.22 × 45 =
  35. 35.15 × 24 =
  36. 36.20 × 35 =
  37. 37.75 × 22 =
  38. 38.6 × 15 =
  39. 39.35 × 38 =
  40. 40.16 × 45 =

Answer key

  1. 2500
  2. 2500
  3. 650
  4. 1870
  5. 2400
  6. 2080
  7. 910
  8. 630
  9. 300
  10. 1260
  11. 4250
  12. 880
  13. 900
  14. 120
  15. 810
  16. 480
  17. 650
  18. 1120
  19. 270
  20. 2000
  21. 2600
  22. 280
  23. 2500
  24. 4000
  25. 510
  26. 630
  27. 1190
  28. 560
  29. 2100
  30. 660
  31. 2850
  32. 3250
  33. 270
  34. 990
  35. 360
  36. 700
  37. 1650
  38. 90
  39. 1330
  40. 720

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