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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 301 · 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. 1.83 × 50 =
  2. 2.92 × 50 =
  3. 3.51 × 50 =
  4. 4.52 × 50 =
  5. 5.26 × 5 =
  6. 6.70 × 5 =
  7. 7.24 × 5 =
  8. 8.61 × 5 =
  9. 9.49 × 5 =
  10. 10.16 × 50 =
  11. 11.26 × 5 =
  12. 12.22 × 5 =
  13. 13.78 × 50 =
  14. 14.23 × 50 =
  15. 15.45 × 50 =
  16. 16.65 × 50 =
  17. 17.18 × 5 =
  18. 18.27 × 5 =
  19. 19.85 × 5 =
  20. 20.45 × 5 =
  21. 21.92 × 5 =
  22. 22.85 × 5 =
  23. 23.49 × 5 =
  24. 24.14 × 5 =
  25. 25.87 × 5 =
  26. 26.73 × 5 =
  27. 27.93 × 5 =
  28. 28.45 × 5 =
  29. 29.27 × 5 =
  30. 30.72 × 50 =
  31. 31.30 × 5 =
  32. 32.21 × 50 =
  33. 33.60 × 5 =
  34. 34.45 × 50 =
  35. 35.33 × 50 =
  36. 36.23 × 50 =
  37. 37.78 × 5 =
  38. 38.39 × 5 =
  39. 39.56 × 50 =
  40. 40.67 × 5 =

Answer key

  1. 4150
  2. 4600
  3. 2550
  4. 2600
  5. 130
  6. 350
  7. 120
  8. 305
  9. 245
  10. 800
  11. 130
  12. 110
  13. 3900
  14. 1150
  15. 2250
  16. 3250
  17. 90
  18. 135
  19. 425
  20. 225
  21. 460
  22. 425
  23. 245
  24. 70
  25. 435
  26. 365
  27. 465
  28. 225
  29. 135
  30. 3600
  31. 150
  32. 1050
  33. 300
  34. 2250
  35. 1650
  36. 1150
  37. 390
  38. 195
  39. 2800
  40. 335

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