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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 352 · 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. 1.64 × 5 =
  2. 2.31 × 5 =
  3. 3.57 × 5 =
  4. 4.15 × 5 =
  5. 5.61 × 50 =
  6. 6.75 × 50 =
  7. 7.42 × 5 =
  8. 8.98 × 50 =
  9. 9.39 × 50 =
  10. 10.90 × 50 =
  11. 11.33 × 50 =
  12. 12.85 × 5 =
  13. 13.30 × 50 =
  14. 14.31 × 5 =
  15. 15.89 × 50 =
  16. 16.57 × 5 =
  17. 17.52 × 50 =
  18. 18.47 × 5 =
  19. 19.66 × 5 =
  20. 20.62 × 50 =
  21. 21.29 × 5 =
  22. 22.38 × 50 =
  23. 23.60 × 5 =
  24. 24.70 × 5 =
  25. 25.31 × 50 =
  26. 26.47 × 50 =
  27. 27.92 × 50 =
  28. 28.39 × 5 =
  29. 29.81 × 5 =
  30. 30.81 × 50 =
  31. 31.71 × 50 =
  32. 32.96 × 5 =
  33. 33.60 × 50 =
  34. 34.25 × 5 =
  35. 35.28 × 50 =
  36. 36.79 × 5 =
  37. 37.71 × 50 =
  38. 38.67 × 5 =
  39. 39.27 × 50 =
  40. 40.90 × 50 =

Answer key

  1. 320
  2. 155
  3. 285
  4. 75
  5. 3050
  6. 3750
  7. 210
  8. 4900
  9. 1950
  10. 4500
  11. 1650
  12. 425
  13. 1500
  14. 155
  15. 4450
  16. 285
  17. 2600
  18. 235
  19. 330
  20. 3100
  21. 145
  22. 1900
  23. 300
  24. 350
  25. 1550
  26. 2350
  27. 4600
  28. 195
  29. 405
  30. 4050
  31. 3550
  32. 480
  33. 3000
  34. 125
  35. 1400
  36. 395
  37. 3550
  38. 335
  39. 1350
  40. 4500

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