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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 450 · 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. 1.98 × 50 =
  2. 2.58 × 5 =
  3. 3.89 × 50 =
  4. 4.49 × 5 =
  5. 5.24 × 5 =
  6. 6.73 × 5 =
  7. 7.31 × 5 =
  8. 8.80 × 5 =
  9. 9.30 × 50 =
  10. 10.12 × 5 =
  11. 11.51 × 5 =
  12. 12.34 × 50 =
  13. 13.21 × 5 =
  14. 14.84 × 5 =
  15. 15.13 × 5 =
  16. 16.58 × 50 =
  17. 17.70 × 50 =
  18. 18.16 × 50 =
  19. 19.12 × 50 =
  20. 20.45 × 5 =
  21. 21.48 × 50 =
  22. 22.48 × 50 =
  23. 23.20 × 5 =
  24. 24.46 × 50 =
  25. 25.70 × 50 =
  26. 26.78 × 50 =
  27. 27.70 × 5 =
  28. 28.33 × 50 =
  29. 29.17 × 50 =
  30. 30.54 × 5 =
  31. 31.53 × 5 =
  32. 32.88 × 5 =
  33. 33.56 × 5 =
  34. 34.92 × 50 =
  35. 35.50 × 5 =
  36. 36.94 × 5 =
  37. 37.24 × 5 =
  38. 38.18 × 5 =
  39. 39.72 × 5 =
  40. 40.85 × 50 =

Answer key

  1. 4900
  2. 290
  3. 4450
  4. 245
  5. 120
  6. 365
  7. 155
  8. 400
  9. 1500
  10. 60
  11. 255
  12. 1700
  13. 105
  14. 420
  15. 65
  16. 2900
  17. 3500
  18. 800
  19. 600
  20. 225
  21. 2400
  22. 2400
  23. 100
  24. 2300
  25. 3500
  26. 3900
  27. 350
  28. 1650
  29. 850
  30. 270
  31. 265
  32. 440
  33. 280
  34. 4600
  35. 250
  36. 470
  37. 120
  38. 90
  39. 360
  40. 4250

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