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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 19 · 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. 1.42 × 50 =
  2. 2.19 × 50 =
  3. 3.22 × 50 =
  4. 4.89 × 50 =
  5. 5.24 × 5 =
  6. 6.26 × 5 =
  7. 7.31 × 5 =
  8. 8.90 × 50 =
  9. 9.21 × 5 =
  10. 10.28 × 50 =
  11. 11.13 × 50 =
  12. 12.61 × 5 =
  13. 13.25 × 50 =
  14. 14.98 × 5 =
  15. 15.91 × 50 =
  16. 16.20 × 50 =
  17. 17.39 × 50 =
  18. 18.81 × 5 =
  19. 19.34 × 5 =
  20. 20.25 × 5 =
  21. 21.37 × 5 =
  22. 22.24 × 5 =
  23. 23.16 × 50 =
  24. 24.81 × 5 =
  25. 25.13 × 50 =
  26. 26.42 × 5 =
  27. 27.34 × 5 =
  28. 28.55 × 50 =
  29. 29.41 × 5 =
  30. 30.53 × 5 =
  31. 31.89 × 5 =
  32. 32.25 × 5 =
  33. 33.17 × 5 =
  34. 34.37 × 5 =
  35. 35.30 × 5 =
  36. 36.85 × 5 =
  37. 37.21 × 50 =
  38. 38.70 × 5 =
  39. 39.49 × 50 =
  40. 40.18 × 5 =

Answer key

  1. 2100
  2. 950
  3. 1100
  4. 4450
  5. 120
  6. 130
  7. 155
  8. 4500
  9. 105
  10. 1400
  11. 650
  12. 305
  13. 1250
  14. 490
  15. 4550
  16. 1000
  17. 1950
  18. 405
  19. 170
  20. 125
  21. 185
  22. 120
  23. 800
  24. 405
  25. 650
  26. 210
  27. 170
  28. 2750
  29. 205
  30. 265
  31. 445
  32. 125
  33. 85
  34. 185
  35. 150
  36. 425
  37. 1050
  38. 350
  39. 2450
  40. 90

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