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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 475 · 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. 1.48 × 50 =
  2. 2.98 × 5 =
  3. 3.79 × 5 =
  4. 4.39 × 5 =
  5. 5.52 × 5 =
  6. 6.78 × 50 =
  7. 7.48 × 5 =
  8. 8.58 × 5 =
  9. 9.24 × 50 =
  10. 10.77 × 5 =
  11. 11.30 × 50 =
  12. 12.42 × 5 =
  13. 13.27 × 50 =
  14. 14.60 × 5 =
  15. 15.69 × 5 =
  16. 16.16 × 5 =
  17. 17.49 × 5 =
  18. 18.38 × 50 =
  19. 19.53 × 5 =
  20. 20.94 × 5 =
  21. 21.13 × 50 =
  22. 22.62 × 50 =
  23. 23.75 × 5 =
  24. 24.50 × 50 =
  25. 25.41 × 5 =
  26. 26.62 × 50 =
  27. 27.95 × 5 =
  28. 28.63 × 5 =
  29. 29.19 × 5 =
  30. 30.82 × 5 =
  31. 31.26 × 50 =
  32. 32.21 × 5 =
  33. 33.44 × 5 =
  34. 34.44 × 5 =
  35. 35.91 × 50 =
  36. 36.54 × 50 =
  37. 37.17 × 50 =
  38. 38.70 × 5 =
  39. 39.36 × 5 =
  40. 40.26 × 5 =

Answer key

  1. 2400
  2. 490
  3. 395
  4. 195
  5. 260
  6. 3900
  7. 240
  8. 290
  9. 1200
  10. 385
  11. 1500
  12. 210
  13. 1350
  14. 300
  15. 345
  16. 80
  17. 245
  18. 1900
  19. 265
  20. 470
  21. 650
  22. 3100
  23. 375
  24. 2500
  25. 205
  26. 3100
  27. 475
  28. 315
  29. 95
  30. 410
  31. 1300
  32. 105
  33. 220
  34. 220
  35. 4550
  36. 2700
  37. 850
  38. 350
  39. 180
  40. 130

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