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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 264 · 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. 1.75 × 5 =
  2. 2.62 × 5 =
  3. 3.49 × 5 =
  4. 4.14 × 5 =
  5. 5.72 × 5 =
  6. 6.15 × 50 =
  7. 7.22 × 50 =
  8. 8.98 × 50 =
  9. 9.79 × 5 =
  10. 10.25 × 50 =
  11. 11.17 × 50 =
  12. 12.19 × 5 =
  13. 13.58 × 50 =
  14. 14.55 × 5 =
  15. 15.62 × 5 =
  16. 16.80 × 50 =
  17. 17.17 × 50 =
  18. 18.55 × 5 =
  19. 19.70 × 5 =
  20. 20.46 × 50 =
  21. 21.30 × 50 =
  22. 22.86 × 5 =
  23. 23.73 × 5 =
  24. 24.28 × 50 =
  25. 25.72 × 5 =
  26. 26.63 × 50 =
  27. 27.82 × 50 =
  28. 28.43 × 50 =
  29. 29.44 × 5 =
  30. 30.77 × 5 =
  31. 31.88 × 5 =
  32. 32.14 × 5 =
  33. 33.37 × 50 =
  34. 34.76 × 5 =
  35. 35.71 × 5 =
  36. 36.62 × 5 =
  37. 37.62 × 5 =
  38. 38.25 × 5 =
  39. 39.94 × 5 =
  40. 40.58 × 5 =

Answer key

  1. 375
  2. 310
  3. 245
  4. 70
  5. 360
  6. 750
  7. 1100
  8. 4900
  9. 395
  10. 1250
  11. 850
  12. 95
  13. 2900
  14. 275
  15. 310
  16. 4000
  17. 850
  18. 275
  19. 350
  20. 2300
  21. 1500
  22. 430
  23. 365
  24. 1400
  25. 360
  26. 3150
  27. 4100
  28. 2150
  29. 220
  30. 385
  31. 440
  32. 70
  33. 1850
  34. 380
  35. 355
  36. 310
  37. 310
  38. 125
  39. 470
  40. 290

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