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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 810 · 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. 1.31 × 5 =
  2. 2.80 × 50 =
  3. 3.54 × 50 =
  4. 4.55 × 50 =
  5. 5.52 × 50 =
  6. 6.83 × 5 =
  7. 7.14 × 5 =
  8. 8.43 × 5 =
  9. 9.13 × 5 =
  10. 10.62 × 5 =
  11. 11.29 × 50 =
  12. 12.25 × 50 =
  13. 13.71 × 5 =
  14. 14.55 × 5 =
  15. 15.62 × 50 =
  16. 16.92 × 50 =
  17. 17.14 × 5 =
  18. 18.27 × 50 =
  19. 19.34 × 5 =
  20. 20.84 × 5 =
  21. 21.37 × 5 =
  22. 22.67 × 50 =
  23. 23.82 × 5 =
  24. 24.72 × 50 =
  25. 25.33 × 5 =
  26. 26.20 × 5 =
  27. 27.91 × 5 =
  28. 28.41 × 5 =
  29. 29.79 × 5 =
  30. 30.89 × 5 =
  31. 31.60 × 5 =
  32. 32.65 × 5 =
  33. 33.21 × 50 =
  34. 34.31 × 5 =
  35. 35.35 × 5 =
  36. 36.60 × 5 =
  37. 37.24 × 5 =
  38. 38.41 × 50 =
  39. 39.96 × 50 =
  40. 40.41 × 5 =

Answer key

  1. 155
  2. 4000
  3. 2700
  4. 2750
  5. 2600
  6. 415
  7. 70
  8. 215
  9. 65
  10. 310
  11. 1450
  12. 1250
  13. 355
  14. 275
  15. 3100
  16. 4600
  17. 70
  18. 1350
  19. 170
  20. 420
  21. 185
  22. 3350
  23. 410
  24. 3600
  25. 165
  26. 100
  27. 455
  28. 205
  29. 395
  30. 445
  31. 300
  32. 325
  33. 1050
  34. 155
  35. 175
  36. 300
  37. 120
  38. 2050
  39. 4800
  40. 205

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