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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 251 · 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. 1.62 × 5 =
  2. 2.40 × 5 =
  3. 3.27 × 50 =
  4. 4.70 × 5 =
  5. 5.70 × 5 =
  6. 6.94 × 50 =
  7. 7.52 × 50 =
  8. 8.13 × 5 =
  9. 9.79 × 50 =
  10. 10.87 × 5 =
  11. 11.41 × 5 =
  12. 12.43 × 5 =
  13. 13.52 × 5 =
  14. 14.20 × 50 =
  15. 15.78 × 5 =
  16. 16.71 × 50 =
  17. 17.16 × 50 =
  18. 18.47 × 50 =
  19. 19.45 × 5 =
  20. 20.17 × 5 =
  21. 21.76 × 50 =
  22. 22.62 × 50 =
  23. 23.52 × 5 =
  24. 24.34 × 50 =
  25. 25.89 × 5 =
  26. 26.96 × 5 =
  27. 27.49 × 50 =
  28. 28.86 × 5 =
  29. 29.98 × 50 =
  30. 30.52 × 50 =
  31. 31.76 × 50 =
  32. 32.87 × 50 =
  33. 33.13 × 5 =
  34. 34.65 × 5 =
  35. 35.82 × 50 =
  36. 36.34 × 5 =
  37. 37.71 × 50 =
  38. 38.66 × 5 =
  39. 39.23 × 5 =
  40. 40.83 × 5 =

Answer key

  1. 310
  2. 200
  3. 1350
  4. 350
  5. 350
  6. 4700
  7. 2600
  8. 65
  9. 3950
  10. 435
  11. 205
  12. 215
  13. 260
  14. 1000
  15. 390
  16. 3550
  17. 800
  18. 2350
  19. 225
  20. 85
  21. 3800
  22. 3100
  23. 260
  24. 1700
  25. 445
  26. 480
  27. 2450
  28. 430
  29. 4900
  30. 2600
  31. 3800
  32. 4350
  33. 65
  34. 325
  35. 4100
  36. 170
  37. 3550
  38. 330
  39. 115
  40. 415

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