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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 816 · 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. 1.29 × 5 =
  2. 2.39 × 5 =
  3. 3.76 × 50 =
  4. 4.97 × 50 =
  5. 5.24 × 5 =
  6. 6.73 × 50 =
  7. 7.31 × 5 =
  8. 8.61 × 5 =
  9. 9.42 × 50 =
  10. 10.90 × 5 =
  11. 11.95 × 50 =
  12. 12.72 × 5 =
  13. 13.81 × 5 =
  14. 14.48 × 5 =
  15. 15.33 × 50 =
  16. 16.33 × 50 =
  17. 17.74 × 5 =
  18. 18.38 × 5 =
  19. 19.37 × 5 =
  20. 20.56 × 50 =
  21. 21.43 × 50 =
  22. 22.71 × 5 =
  23. 23.37 × 50 =
  24. 24.17 × 5 =
  25. 25.90 × 5 =
  26. 26.48 × 5 =
  27. 27.16 × 50 =
  28. 28.46 × 5 =
  29. 29.16 × 50 =
  30. 30.98 × 50 =
  31. 31.45 × 50 =
  32. 32.47 × 50 =
  33. 33.12 × 5 =
  34. 34.47 × 5 =
  35. 35.18 × 50 =
  36. 36.85 × 5 =
  37. 37.70 × 5 =
  38. 38.31 × 5 =
  39. 39.96 × 5 =
  40. 40.73 × 5 =

Answer key

  1. 145
  2. 195
  3. 3800
  4. 4850
  5. 120
  6. 3650
  7. 155
  8. 305
  9. 2100
  10. 450
  11. 4750
  12. 360
  13. 405
  14. 240
  15. 1650
  16. 1650
  17. 370
  18. 190
  19. 185
  20. 2800
  21. 2150
  22. 355
  23. 1850
  24. 85
  25. 450
  26. 240
  27. 800
  28. 230
  29. 800
  30. 4900
  31. 2250
  32. 2350
  33. 60
  34. 235
  35. 900
  36. 425
  37. 350
  38. 155
  39. 480
  40. 365

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