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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 356 · 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. 1.71 × 5 =
  2. 2.95 × 5 =
  3. 3.82 × 5 =
  4. 4.45 × 50 =
  5. 5.36 × 50 =
  6. 6.28 × 50 =
  7. 7.17 × 5 =
  8. 8.26 × 5 =
  9. 9.53 × 5 =
  10. 10.21 × 5 =
  11. 11.86 × 50 =
  12. 12.70 × 5 =
  13. 13.22 × 50 =
  14. 14.70 × 50 =
  15. 15.16 × 50 =
  16. 16.61 × 5 =
  17. 17.72 × 5 =
  18. 18.68 × 5 =
  19. 19.92 × 5 =
  20. 20.78 × 5 =
  21. 21.17 × 5 =
  22. 22.60 × 5 =
  23. 23.89 × 50 =
  24. 24.54 × 50 =
  25. 25.93 × 50 =
  26. 26.26 × 5 =
  27. 27.31 × 5 =
  28. 28.20 × 5 =
  29. 29.94 × 50 =
  30. 30.51 × 5 =
  31. 31.97 × 5 =
  32. 32.73 × 5 =
  33. 33.66 × 5 =
  34. 34.89 × 5 =
  35. 35.75 × 5 =
  36. 36.21 × 50 =
  37. 37.50 × 5 =
  38. 38.61 × 50 =
  39. 39.21 × 5 =
  40. 40.46 × 5 =

Answer key

  1. 355
  2. 475
  3. 410
  4. 2250
  5. 1800
  6. 1400
  7. 85
  8. 130
  9. 265
  10. 105
  11. 4300
  12. 350
  13. 1100
  14. 3500
  15. 800
  16. 305
  17. 360
  18. 340
  19. 460
  20. 390
  21. 85
  22. 300
  23. 4450
  24. 2700
  25. 4650
  26. 130
  27. 155
  28. 100
  29. 4700
  30. 255
  31. 485
  32. 365
  33. 330
  34. 445
  35. 375
  36. 1050
  37. 250
  38. 3050
  39. 105
  40. 230

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