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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 37 · 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. 1.89 × 50 =
  2. 2.19 × 5 =
  3. 3.92 × 50 =
  4. 4.84 × 50 =
  5. 5.45 × 5 =
  6. 6.28 × 5 =
  7. 7.98 × 50 =
  8. 8.26 × 5 =
  9. 9.81 × 5 =
  10. 10.89 × 5 =
  11. 11.63 × 5 =
  12. 12.27 × 5 =
  13. 13.57 × 5 =
  14. 14.65 × 5 =
  15. 15.88 × 5 =
  16. 16.87 × 5 =
  17. 17.82 × 50 =
  18. 18.25 × 5 =
  19. 19.92 × 5 =
  20. 20.66 × 5 =
  21. 21.93 × 50 =
  22. 22.73 × 50 =
  23. 23.37 × 50 =
  24. 24.22 × 5 =
  25. 25.80 × 5 =
  26. 26.60 × 5 =
  27. 27.93 × 5 =
  28. 28.72 × 5 =
  29. 29.17 × 5 =
  30. 30.25 × 5 =
  31. 31.76 × 5 =
  32. 32.88 × 50 =
  33. 33.88 × 5 =
  34. 34.70 × 5 =
  35. 35.52 × 5 =
  36. 36.82 × 5 =
  37. 37.76 × 5 =
  38. 38.18 × 50 =
  39. 39.31 × 50 =
  40. 40.17 × 50 =

Answer key

  1. 4450
  2. 95
  3. 4600
  4. 4200
  5. 225
  6. 140
  7. 4900
  8. 130
  9. 405
  10. 445
  11. 315
  12. 135
  13. 285
  14. 325
  15. 440
  16. 435
  17. 4100
  18. 125
  19. 460
  20. 330
  21. 4650
  22. 3650
  23. 1850
  24. 110
  25. 400
  26. 300
  27. 465
  28. 360
  29. 85
  30. 125
  31. 380
  32. 4400
  33. 440
  34. 350
  35. 260
  36. 410
  37. 380
  38. 900
  39. 1550
  40. 850

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