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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 474 · 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. 1.14 × 50 =
  2. 2.90 × 50 =
  3. 3.57 × 50 =
  4. 4.72 × 5 =
  5. 5.67 × 5 =
  6. 6.37 × 5 =
  7. 7.20 × 5 =
  8. 8.53 × 5 =
  9. 9.79 × 5 =
  10. 10.30 × 50 =
  11. 11.51 × 5 =
  12. 12.54 × 5 =
  13. 13.15 × 5 =
  14. 14.60 × 50 =
  15. 15.26 × 5 =
  16. 16.12 × 5 =
  17. 17.47 × 50 =
  18. 18.33 × 5 =
  19. 19.35 × 50 =
  20. 20.36 × 5 =
  21. 21.38 × 50 =
  22. 22.24 × 5 =
  23. 23.14 × 5 =
  24. 24.30 × 5 =
  25. 25.25 × 50 =
  26. 26.19 × 5 =
  27. 27.54 × 5 =
  28. 28.13 × 50 =
  29. 29.34 × 50 =
  30. 30.29 × 50 =
  31. 31.29 × 5 =
  32. 32.94 × 5 =
  33. 33.80 × 50 =
  34. 34.59 × 50 =
  35. 35.94 × 5 =
  36. 36.60 × 5 =
  37. 37.61 × 5 =
  38. 38.45 × 5 =
  39. 39.21 × 50 =
  40. 40.98 × 50 =

Answer key

  1. 700
  2. 4500
  3. 2850
  4. 360
  5. 335
  6. 185
  7. 100
  8. 265
  9. 395
  10. 1500
  11. 255
  12. 270
  13. 75
  14. 3000
  15. 130
  16. 60
  17. 2350
  18. 165
  19. 1750
  20. 180
  21. 1900
  22. 120
  23. 70
  24. 150
  25. 1250
  26. 95
  27. 270
  28. 650
  29. 1700
  30. 1450
  31. 145
  32. 470
  33. 4000
  34. 2950
  35. 470
  36. 300
  37. 305
  38. 225
  39. 1050
  40. 4900

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