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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 181 · 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. 1.29 × 5 =
  2. 2.54 × 5 =
  3. 3.28 × 5 =
  4. 4.54 × 50 =
  5. 5.33 × 5 =
  6. 6.29 × 50 =
  7. 7.69 × 5 =
  8. 8.94 × 50 =
  9. 9.49 × 50 =
  10. 10.49 × 5 =
  11. 11.22 × 50 =
  12. 12.20 × 5 =
  13. 13.28 × 50 =
  14. 14.18 × 50 =
  15. 15.90 × 5 =
  16. 16.29 × 5 =
  17. 17.33 × 50 =
  18. 18.72 × 5 =
  19. 19.83 × 50 =
  20. 20.43 × 50 =
  21. 21.34 × 50 =
  22. 22.43 × 50 =
  23. 23.34 × 50 =
  24. 24.25 × 50 =
  25. 25.42 × 50 =
  26. 26.74 × 5 =
  27. 27.33 × 5 =
  28. 28.22 × 50 =
  29. 29.30 × 5 =
  30. 30.35 × 5 =
  31. 31.58 × 50 =
  32. 32.81 × 50 =
  33. 33.17 × 50 =
  34. 34.48 × 5 =
  35. 35.56 × 5 =
  36. 36.83 × 50 =
  37. 37.30 × 5 =
  38. 38.29 × 50 =
  39. 39.42 × 5 =
  40. 40.33 × 50 =

Answer key

  1. 145
  2. 270
  3. 140
  4. 2700
  5. 165
  6. 1450
  7. 345
  8. 4700
  9. 2450
  10. 245
  11. 1100
  12. 100
  13. 1400
  14. 900
  15. 450
  16. 145
  17. 1650
  18. 360
  19. 4150
  20. 2150
  21. 1700
  22. 2150
  23. 1700
  24. 1250
  25. 2100
  26. 370
  27. 165
  28. 1100
  29. 150
  30. 175
  31. 2900
  32. 4050
  33. 850
  34. 240
  35. 280
  36. 4150
  37. 150
  38. 1450
  39. 210
  40. 1650

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