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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 373 · 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. 1.41 × 5 =
  2. 2.35 × 5 =
  3. 3.43 × 5 =
  4. 4.57 × 5 =
  5. 5.62 × 50 =
  6. 6.61 × 50 =
  7. 7.60 × 5 =
  8. 8.84 × 50 =
  9. 9.20 × 50 =
  10. 10.71 × 50 =
  11. 11.86 × 5 =
  12. 12.97 × 5 =
  13. 13.38 × 5 =
  14. 14.69 × 5 =
  15. 15.14 × 50 =
  16. 16.65 × 50 =
  17. 17.12 × 50 =
  18. 18.31 × 50 =
  19. 19.55 × 50 =
  20. 20.69 × 5 =
  21. 21.20 × 50 =
  22. 22.47 × 5 =
  23. 23.20 × 50 =
  24. 24.97 × 5 =
  25. 25.80 × 50 =
  26. 26.54 × 5 =
  27. 27.35 × 50 =
  28. 28.85 × 5 =
  29. 29.48 × 50 =
  30. 30.72 × 5 =
  31. 31.97 × 5 =
  32. 32.92 × 5 =
  33. 33.51 × 5 =
  34. 34.84 × 5 =
  35. 35.37 × 50 =
  36. 36.41 × 50 =
  37. 37.84 × 50 =
  38. 38.42 × 5 =
  39. 39.50 × 50 =
  40. 40.34 × 5 =

Answer key

  1. 205
  2. 175
  3. 215
  4. 285
  5. 3100
  6. 3050
  7. 300
  8. 4200
  9. 1000
  10. 3550
  11. 430
  12. 485
  13. 190
  14. 345
  15. 700
  16. 3250
  17. 600
  18. 1550
  19. 2750
  20. 345
  21. 1000
  22. 235
  23. 1000
  24. 485
  25. 4000
  26. 270
  27. 1750
  28. 425
  29. 2400
  30. 360
  31. 485
  32. 460
  33. 255
  34. 420
  35. 1850
  36. 2050
  37. 4200
  38. 210
  39. 2500
  40. 170

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