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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 425 · 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. 1.49 × 5 =
  2. 2.94 × 5 =
  3. 3.77 × 50 =
  4. 4.18 × 50 =
  5. 5.87 × 5 =
  6. 6.82 × 50 =
  7. 7.54 × 50 =
  8. 8.33 × 5 =
  9. 9.91 × 50 =
  10. 10.80 × 50 =
  11. 11.35 × 5 =
  12. 12.91 × 5 =
  13. 13.14 × 5 =
  14. 14.63 × 50 =
  15. 15.33 × 5 =
  16. 16.94 × 5 =
  17. 17.23 × 5 =
  18. 18.96 × 50 =
  19. 19.92 × 50 =
  20. 20.91 × 5 =
  21. 21.33 × 50 =
  22. 22.86 × 5 =
  23. 23.34 × 5 =
  24. 24.56 × 50 =
  25. 25.58 × 50 =
  26. 26.57 × 5 =
  27. 27.76 × 50 =
  28. 28.22 × 5 =
  29. 29.34 × 5 =
  30. 30.48 × 5 =
  31. 31.83 × 5 =
  32. 32.14 × 5 =
  33. 33.18 × 5 =
  34. 34.61 × 50 =
  35. 35.60 × 5 =
  36. 36.79 × 5 =
  37. 37.75 × 5 =
  38. 38.45 × 5 =
  39. 39.93 × 50 =
  40. 40.86 × 5 =

Answer key

  1. 245
  2. 470
  3. 3850
  4. 900
  5. 435
  6. 4100
  7. 2700
  8. 165
  9. 4550
  10. 4000
  11. 175
  12. 455
  13. 70
  14. 3150
  15. 165
  16. 470
  17. 115
  18. 4800
  19. 4600
  20. 455
  21. 1650
  22. 430
  23. 170
  24. 2800
  25. 2900
  26. 285
  27. 3800
  28. 110
  29. 170
  30. 240
  31. 415
  32. 70
  33. 90
  34. 3050
  35. 300
  36. 395
  37. 375
  38. 225
  39. 4650
  40. 430

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