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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 138 · 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. 1.17 × 5 =
  2. 2.73 × 5 =
  3. 3.84 × 50 =
  4. 4.24 × 5 =
  5. 5.29 × 5 =
  6. 6.44 × 50 =
  7. 7.55 × 50 =
  8. 8.31 × 5 =
  9. 9.84 × 5 =
  10. 10.60 × 50 =
  11. 11.32 × 50 =
  12. 12.34 × 5 =
  13. 13.94 × 50 =
  14. 14.93 × 50 =
  15. 15.76 × 5 =
  16. 16.63 × 50 =
  17. 17.37 × 50 =
  18. 18.23 × 5 =
  19. 19.30 × 5 =
  20. 20.29 × 5 =
  21. 21.55 × 5 =
  22. 22.45 × 50 =
  23. 23.86 × 50 =
  24. 24.66 × 50 =
  25. 25.78 × 5 =
  26. 26.13 × 5 =
  27. 27.50 × 5 =
  28. 28.51 × 50 =
  29. 29.88 × 5 =
  30. 30.42 × 50 =
  31. 31.83 × 50 =
  32. 32.55 × 5 =
  33. 33.12 × 50 =
  34. 34.36 × 5 =
  35. 35.40 × 5 =
  36. 36.97 × 50 =
  37. 37.37 × 50 =
  38. 38.13 × 5 =
  39. 39.83 × 5 =
  40. 40.89 × 5 =

Answer key

  1. 85
  2. 365
  3. 4200
  4. 120
  5. 145
  6. 2200
  7. 2750
  8. 155
  9. 420
  10. 3000
  11. 1600
  12. 170
  13. 4700
  14. 4650
  15. 380
  16. 3150
  17. 1850
  18. 115
  19. 150
  20. 145
  21. 275
  22. 2250
  23. 4300
  24. 3300
  25. 390
  26. 65
  27. 250
  28. 2550
  29. 440
  30. 2100
  31. 4150
  32. 275
  33. 600
  34. 180
  35. 200
  36. 4850
  37. 1850
  38. 65
  39. 415
  40. 445

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