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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 190 · 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. 1.81 × 50 =
  2. 2.81 × 5 =
  3. 3.34 × 5 =
  4. 4.75 × 5 =
  5. 5.20 × 50 =
  6. 6.65 × 5 =
  7. 7.31 × 5 =
  8. 8.88 × 50 =
  9. 9.13 × 5 =
  10. 10.70 × 5 =
  11. 11.94 × 5 =
  12. 12.79 × 5 =
  13. 13.56 × 5 =
  14. 14.52 × 50 =
  15. 15.59 × 5 =
  16. 16.41 × 5 =
  17. 17.58 × 5 =
  18. 18.77 × 5 =
  19. 19.48 × 5 =
  20. 20.47 × 50 =
  21. 21.68 × 50 =
  22. 22.89 × 5 =
  23. 23.97 × 5 =
  24. 24.95 × 50 =
  25. 25.76 × 50 =
  26. 26.26 × 5 =
  27. 27.25 × 50 =
  28. 28.88 × 5 =
  29. 29.63 × 5 =
  30. 30.47 × 50 =
  31. 31.25 × 50 =
  32. 32.68 × 50 =
  33. 33.66 × 50 =
  34. 34.41 × 5 =
  35. 35.21 × 5 =
  36. 36.13 × 5 =
  37. 37.57 × 5 =
  38. 38.96 × 50 =
  39. 39.50 × 50 =
  40. 40.73 × 50 =

Answer key

  1. 4050
  2. 405
  3. 170
  4. 375
  5. 1000
  6. 325
  7. 155
  8. 4400
  9. 65
  10. 350
  11. 470
  12. 395
  13. 280
  14. 2600
  15. 295
  16. 205
  17. 290
  18. 385
  19. 240
  20. 2350
  21. 3400
  22. 445
  23. 485
  24. 4750
  25. 3800
  26. 130
  27. 1250
  28. 440
  29. 315
  30. 2350
  31. 1250
  32. 3400
  33. 3300
  34. 205
  35. 105
  36. 65
  37. 285
  38. 4800
  39. 2500
  40. 3650

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