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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 907 · 40 questions
TalentJR

The fast method (Halve first): Halve the number. × 5: multiply the half by 10. × 50: multiply the half by 100. Odd number? Its half ends in .5 — 43 → 21.5 — and × 10 moves the point: 215.

NameDateTime takenScore ___ / 40
  1. 1.93 × 50 =
  2. 2.19 × 50 =
  3. 3.37 × 50 =
  4. 4.28 × 50 =
  5. 5.20 × 50 =
  6. 6.54 × 50 =
  7. 7.73 × 5 =
  8. 8.42 × 50 =
  9. 9.26 × 5 =
  10. 10.43 × 5 =
  11. 11.52 × 5 =
  12. 12.51 × 5 =
  13. 13.88 × 50 =
  14. 14.13 × 50 =
  15. 15.82 × 5 =
  16. 16.44 × 5 =
  17. 17.51 × 50 =
  18. 18.42 × 50 =
  19. 19.15 × 50 =
  20. 20.74 × 5 =
  21. 21.89 × 5 =
  22. 22.96 × 5 =
  23. 23.43 × 5 =
  24. 24.51 × 5 =
  25. 25.71 × 5 =
  26. 26.22 × 5 =
  27. 27.96 × 5 =
  28. 28.17 × 50 =
  29. 29.72 × 50 =
  30. 30.83 × 5 =
  31. 31.30 × 50 =
  32. 32.54 × 5 =
  33. 33.35 × 50 =
  34. 34.47 × 5 =
  35. 35.70 × 5 =
  36. 36.55 × 5 =
  37. 37.47 × 50 =
  38. 38.62 × 50 =
  39. 39.97 × 50 =
  40. 40.61 × 5 =

Answer key

  1. 4650
  2. 950
  3. 1850
  4. 1400
  5. 1000
  6. 2700
  7. 365
  8. 2100
  9. 130
  10. 215
  11. 260
  12. 255
  13. 4400
  14. 650
  15. 410
  16. 220
  17. 2550
  18. 2100
  19. 750
  20. 370
  21. 445
  22. 480
  23. 215
  24. 255
  25. 355
  26. 110
  27. 480
  28. 850
  29. 3600
  30. 415
  31. 1500
  32. 270
  33. 1750
  34. 235
  35. 350
  36. 275
  37. 2350
  38. 3100
  39. 4850
  40. 305

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