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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 949 · 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. 1.8 × 55 =
  2. 2.32 × 75 =
  3. 3.15 × 26 =
  4. 4.75 × 12 =
  5. 5.15 × 16 =
  6. 6.8 × 55 =
  7. 7.65 × 26 =
  8. 8.75 × 28 =
  9. 9.75 × 38 =
  10. 10.15 × 22 =
  11. 11.24 × 55 =
  12. 12.15 × 40 =
  13. 13.8 × 15 =
  14. 14.15 × 8 =
  15. 15.18 × 15 =
  16. 16.34 × 25 =
  17. 17.22 × 35 =
  18. 18.6 × 25 =
  19. 19.32 × 15 =
  20. 20.12 × 75 =
  21. 21.65 × 8 =
  22. 22.28 × 125 =
  23. 23.30 × 125 =
  24. 24.65 × 24 =
  25. 25.65 × 14 =
  26. 26.15 × 12 =
  27. 27.14 × 75 =
  28. 28.20 × 125 =
  29. 29.25 × 16 =
  30. 30.34 × 125 =
  31. 31.24 × 45 =
  32. 32.55 × 38 =
  33. 33.15 × 12 =
  34. 34.75 × 16 =
  35. 35.125 × 8 =
  36. 36.55 × 18 =
  37. 37.40 × 75 =
  38. 38.32 × 25 =
  39. 39.75 × 28 =
  40. 40.32 × 75 =

Answer key

  1. 440
  2. 2400
  3. 390
  4. 900
  5. 240
  6. 440
  7. 1690
  8. 2100
  9. 2850
  10. 330
  11. 1320
  12. 600
  13. 120
  14. 120
  15. 270
  16. 850
  17. 770
  18. 150
  19. 480
  20. 900
  21. 520
  22. 3500
  23. 3750
  24. 1560
  25. 910
  26. 180
  27. 1050
  28. 2500
  29. 400
  30. 4250
  31. 1080
  32. 2090
  33. 180
  34. 1200
  35. 1000
  36. 990
  37. 3000
  38. 800
  39. 2100
  40. 2400

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