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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 164 · 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. 2.41 × 50 =
  3. 3.98 × 50 =
  4. 4.36 × 50 =
  5. 5.28 × 5 =
  6. 6.71 × 5 =
  7. 7.49 × 5 =
  8. 8.37 × 50 =
  9. 9.39 × 5 =
  10. 10.92 × 50 =
  11. 11.25 × 50 =
  12. 12.48 × 5 =
  13. 13.95 × 50 =
  14. 14.59 × 50 =
  15. 15.96 × 5 =
  16. 16.38 × 5 =
  17. 17.71 × 50 =
  18. 18.71 × 50 =
  19. 19.80 × 50 =
  20. 20.74 × 5 =
  21. 21.49 × 5 =
  22. 22.20 × 5 =
  23. 23.52 × 50 =
  24. 24.30 × 5 =
  25. 25.15 × 5 =
  26. 26.21 × 50 =
  27. 27.20 × 5 =
  28. 28.66 × 5 =
  29. 29.24 × 5 =
  30. 30.22 × 5 =
  31. 31.44 × 5 =
  32. 32.26 × 5 =
  33. 33.77 × 50 =
  34. 34.41 × 50 =
  35. 35.51 × 50 =
  36. 36.13 × 50 =
  37. 37.97 × 5 =
  38. 38.40 × 5 =
  39. 39.72 × 50 =
  40. 40.62 × 50 =

Answer key

  1. 145
  2. 2050
  3. 4900
  4. 1800
  5. 140
  6. 355
  7. 245
  8. 1850
  9. 195
  10. 4600
  11. 1250
  12. 240
  13. 4750
  14. 2950
  15. 480
  16. 190
  17. 3550
  18. 3550
  19. 4000
  20. 370
  21. 245
  22. 100
  23. 2600
  24. 150
  25. 75
  26. 1050
  27. 100
  28. 330
  29. 120
  30. 110
  31. 220
  32. 130
  33. 3850
  34. 2050
  35. 2550
  36. 650
  37. 485
  38. 200
  39. 3600
  40. 3100

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