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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 371 · 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. 1.83 × 5 =
  2. 2.60 × 50 =
  3. 3.92 × 5 =
  4. 4.69 × 5 =
  5. 5.75 × 50 =
  6. 6.96 × 50 =
  7. 7.52 × 50 =
  8. 8.26 × 5 =
  9. 9.15 × 50 =
  10. 10.74 × 50 =
  11. 11.25 × 50 =
  12. 12.26 × 50 =
  13. 13.95 × 5 =
  14. 14.30 × 50 =
  15. 15.72 × 5 =
  16. 16.37 × 5 =
  17. 17.60 × 5 =
  18. 18.13 × 5 =
  19. 19.66 × 5 =
  20. 20.97 × 5 =
  21. 21.64 × 50 =
  22. 22.98 × 5 =
  23. 23.30 × 5 =
  24. 24.88 × 5 =
  25. 25.46 × 50 =
  26. 26.78 × 5 =
  27. 27.62 × 5 =
  28. 28.46 × 50 =
  29. 29.30 × 5 =
  30. 30.27 × 5 =
  31. 31.40 × 5 =
  32. 32.36 × 5 =
  33. 33.49 × 5 =
  34. 34.22 × 5 =
  35. 35.56 × 5 =
  36. 36.78 × 50 =
  37. 37.30 × 50 =
  38. 38.92 × 5 =
  39. 39.43 × 5 =
  40. 40.98 × 50 =

Answer key

  1. 415
  2. 3000
  3. 460
  4. 345
  5. 3750
  6. 4800
  7. 2600
  8. 130
  9. 750
  10. 3700
  11. 1250
  12. 1300
  13. 475
  14. 1500
  15. 360
  16. 185
  17. 300
  18. 65
  19. 330
  20. 485
  21. 3200
  22. 490
  23. 150
  24. 440
  25. 2300
  26. 390
  27. 310
  28. 2300
  29. 150
  30. 135
  31. 200
  32. 180
  33. 245
  34. 110
  35. 280
  36. 3900
  37. 1500
  38. 460
  39. 215
  40. 4900

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