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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 173 · 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. 1.73 × 5 =
  2. 2.71 × 50 =
  3. 3.18 × 50 =
  4. 4.59 × 5 =
  5. 5.20 × 5 =
  6. 6.93 × 50 =
  7. 7.24 × 5 =
  8. 8.90 × 50 =
  9. 9.97 × 5 =
  10. 10.53 × 50 =
  11. 11.73 × 5 =
  12. 12.21 × 5 =
  13. 13.18 × 50 =
  14. 14.80 × 5 =
  15. 15.44 × 5 =
  16. 16.28 × 50 =
  17. 17.58 × 5 =
  18. 18.14 × 5 =
  19. 19.32 × 50 =
  20. 20.73 × 5 =
  21. 21.46 × 50 =
  22. 22.17 × 5 =
  23. 23.41 × 5 =
  24. 24.80 × 5 =
  25. 25.23 × 50 =
  26. 26.95 × 5 =
  27. 27.48 × 5 =
  28. 28.72 × 5 =
  29. 29.68 × 50 =
  30. 30.17 × 5 =
  31. 31.46 × 5 =
  32. 32.17 × 50 =
  33. 33.25 × 50 =
  34. 34.83 × 5 =
  35. 35.24 × 50 =
  36. 36.14 × 50 =
  37. 37.28 × 5 =
  38. 38.85 × 50 =
  39. 39.82 × 50 =
  40. 40.40 × 5 =

Answer key

  1. 365
  2. 3550
  3. 900
  4. 295
  5. 100
  6. 4650
  7. 120
  8. 4500
  9. 485
  10. 2650
  11. 365
  12. 105
  13. 900
  14. 400
  15. 220
  16. 1400
  17. 290
  18. 70
  19. 1600
  20. 365
  21. 2300
  22. 85
  23. 205
  24. 400
  25. 1150
  26. 475
  27. 240
  28. 360
  29. 3400
  30. 85
  31. 230
  32. 850
  33. 1250
  34. 415
  35. 1200
  36. 700
  37. 140
  38. 4250
  39. 4100
  40. 200

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