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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 502 · 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. 1.71 × 5 =
  2. 2.85 × 5 =
  3. 3.27 × 50 =
  4. 4.33 × 5 =
  5. 5.78 × 5 =
  6. 6.75 × 5 =
  7. 7.71 × 50 =
  8. 8.31 × 50 =
  9. 9.84 × 5 =
  10. 10.89 × 50 =
  11. 11.56 × 5 =
  12. 12.50 × 5 =
  13. 13.22 × 5 =
  14. 14.93 × 50 =
  15. 15.68 × 50 =
  16. 16.71 × 5 =
  17. 17.49 × 5 =
  18. 18.37 × 50 =
  19. 19.15 × 50 =
  20. 20.83 × 50 =
  21. 21.52 × 50 =
  22. 22.49 × 5 =
  23. 23.54 × 50 =
  24. 24.31 × 50 =
  25. 25.90 × 5 =
  26. 26.91 × 5 =
  27. 27.20 × 5 =
  28. 28.14 × 50 =
  29. 29.51 × 5 =
  30. 30.59 × 50 =
  31. 31.81 × 5 =
  32. 32.91 × 50 =
  33. 33.75 × 5 =
  34. 34.73 × 50 =
  35. 35.69 × 5 =
  36. 36.98 × 5 =
  37. 37.94 × 5 =
  38. 38.35 × 5 =
  39. 39.60 × 5 =
  40. 40.40 × 50 =

Answer key

  1. 355
  2. 425
  3. 1350
  4. 165
  5. 390
  6. 375
  7. 3550
  8. 1550
  9. 420
  10. 4450
  11. 280
  12. 250
  13. 110
  14. 4650
  15. 3400
  16. 355
  17. 245
  18. 1850
  19. 750
  20. 4150
  21. 2600
  22. 245
  23. 2700
  24. 1550
  25. 450
  26. 455
  27. 100
  28. 700
  29. 255
  30. 2950
  31. 405
  32. 4550
  33. 375
  34. 3650
  35. 345
  36. 490
  37. 470
  38. 175
  39. 300
  40. 2000

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