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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 66 · 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. 1.31 × 50 =
  2. 2.74 × 50 =
  3. 3.14 × 5 =
  4. 4.31 × 5 =
  5. 5.52 × 50 =
  6. 6.25 × 50 =
  7. 7.17 × 5 =
  8. 8.74 × 50 =
  9. 9.16 × 5 =
  10. 10.48 × 5 =
  11. 11.30 × 50 =
  12. 12.49 × 5 =
  13. 13.94 × 50 =
  14. 14.43 × 5 =
  15. 15.24 × 50 =
  16. 16.98 × 5 =
  17. 17.85 × 5 =
  18. 18.98 × 5 =
  19. 19.39 × 50 =
  20. 20.53 × 5 =
  21. 21.21 × 5 =
  22. 22.68 × 50 =
  23. 23.68 × 50 =
  24. 24.48 × 5 =
  25. 25.19 × 5 =
  26. 26.19 × 5 =
  27. 27.40 × 5 =
  28. 28.59 × 50 =
  29. 29.40 × 50 =
  30. 30.42 × 50 =
  31. 31.49 × 5 =
  32. 32.45 × 50 =
  33. 33.44 × 50 =
  34. 34.86 × 5 =
  35. 35.45 × 5 =
  36. 36.16 × 50 =
  37. 37.41 × 50 =
  38. 38.83 × 5 =
  39. 39.26 × 50 =
  40. 40.23 × 5 =

Answer key

  1. 1550
  2. 3700
  3. 70
  4. 155
  5. 2600
  6. 1250
  7. 85
  8. 3700
  9. 80
  10. 240
  11. 1500
  12. 245
  13. 4700
  14. 215
  15. 1200
  16. 490
  17. 425
  18. 490
  19. 1950
  20. 265
  21. 105
  22. 3400
  23. 3400
  24. 240
  25. 95
  26. 95
  27. 200
  28. 2950
  29. 2000
  30. 2100
  31. 245
  32. 2250
  33. 2200
  34. 430
  35. 225
  36. 800
  37. 2050
  38. 415
  39. 1300
  40. 115

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