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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 493 · 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. 1.87 × 5 =
  2. 2.15 × 5 =
  3. 3.19 × 5 =
  4. 4.66 × 5 =
  5. 5.42 × 50 =
  6. 6.74 × 5 =
  7. 7.77 × 50 =
  8. 8.74 × 50 =
  9. 9.22 × 50 =
  10. 10.76 × 5 =
  11. 11.28 × 5 =
  12. 12.67 × 50 =
  13. 13.83 × 50 =
  14. 14.23 × 5 =
  15. 15.81 × 5 =
  16. 16.44 × 5 =
  17. 17.22 × 5 =
  18. 18.25 × 5 =
  19. 19.29 × 50 =
  20. 20.92 × 5 =
  21. 21.17 × 5 =
  22. 22.16 × 50 =
  23. 23.53 × 5 =
  24. 24.26 × 5 =
  25. 25.37 × 50 =
  26. 26.33 × 5 =
  27. 27.32 × 50 =
  28. 28.28 × 5 =
  29. 29.26 × 5 =
  30. 30.79 × 50 =
  31. 31.71 × 5 =
  32. 32.69 × 50 =
  33. 33.63 × 50 =
  34. 34.50 × 50 =
  35. 35.44 × 5 =
  36. 36.81 × 50 =
  37. 37.24 × 5 =
  38. 38.36 × 50 =
  39. 39.61 × 5 =
  40. 40.49 × 5 =

Answer key

  1. 435
  2. 75
  3. 95
  4. 330
  5. 2100
  6. 370
  7. 3850
  8. 3700
  9. 1100
  10. 380
  11. 140
  12. 3350
  13. 4150
  14. 115
  15. 405
  16. 220
  17. 110
  18. 125
  19. 1450
  20. 460
  21. 85
  22. 800
  23. 265
  24. 130
  25. 1850
  26. 165
  27. 1600
  28. 140
  29. 130
  30. 3950
  31. 355
  32. 3450
  33. 3150
  34. 2500
  35. 220
  36. 4050
  37. 120
  38. 1800
  39. 305
  40. 245

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