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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 589 · 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. 1.60 × 5 =
  2. 2.81 × 5 =
  3. 3.71 × 50 =
  4. 4.17 × 50 =
  5. 5.14 × 50 =
  6. 6.39 × 50 =
  7. 7.76 × 50 =
  8. 8.40 × 5 =
  9. 9.30 × 5 =
  10. 10.83 × 50 =
  11. 11.79 × 5 =
  12. 12.60 × 5 =
  13. 13.24 × 5 =
  14. 14.93 × 50 =
  15. 15.53 × 50 =
  16. 16.24 × 50 =
  17. 17.87 × 50 =
  18. 18.62 × 50 =
  19. 19.49 × 5 =
  20. 20.71 × 50 =
  21. 21.40 × 50 =
  22. 22.52 × 50 =
  23. 23.28 × 50 =
  24. 24.62 × 5 =
  25. 25.53 × 5 =
  26. 26.41 × 5 =
  27. 27.81 × 5 =
  28. 28.30 × 5 =
  29. 29.29 × 5 =
  30. 30.69 × 5 =
  31. 31.52 × 50 =
  32. 32.90 × 50 =
  33. 33.33 × 50 =
  34. 34.45 × 5 =
  35. 35.55 × 5 =
  36. 36.41 × 50 =
  37. 37.72 × 50 =
  38. 38.84 × 5 =
  39. 39.91 × 50 =
  40. 40.28 × 50 =

Answer key

  1. 300
  2. 405
  3. 3550
  4. 850
  5. 700
  6. 1950
  7. 3800
  8. 200
  9. 150
  10. 4150
  11. 395
  12. 300
  13. 120
  14. 4650
  15. 2650
  16. 1200
  17. 4350
  18. 3100
  19. 245
  20. 3550
  21. 2000
  22. 2600
  23. 1400
  24. 310
  25. 265
  26. 205
  27. 405
  28. 150
  29. 145
  30. 345
  31. 2600
  32. 4500
  33. 1650
  34. 225
  35. 275
  36. 2050
  37. 3600
  38. 420
  39. 4550
  40. 1400

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