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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 458 · 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. 1.35 × 50 =
  2. 2.78 × 5 =
  3. 3.63 × 50 =
  4. 4.50 × 5 =
  5. 5.33 × 50 =
  6. 6.73 × 50 =
  7. 7.41 × 5 =
  8. 8.37 × 5 =
  9. 9.18 × 5 =
  10. 10.33 × 5 =
  11. 11.37 × 50 =
  12. 12.91 × 50 =
  13. 13.48 × 50 =
  14. 14.85 × 5 =
  15. 15.64 × 5 =
  16. 16.17 × 5 =
  17. 17.43 × 5 =
  18. 18.70 × 5 =
  19. 19.58 × 50 =
  20. 20.41 × 5 =
  21. 21.24 × 5 =
  22. 22.24 × 50 =
  23. 23.56 × 5 =
  24. 24.61 × 5 =
  25. 25.22 × 5 =
  26. 26.14 × 5 =
  27. 27.84 × 5 =
  28. 28.56 × 5 =
  29. 29.57 × 5 =
  30. 30.49 × 5 =
  31. 31.79 × 5 =
  32. 32.31 × 50 =
  33. 33.30 × 50 =
  34. 34.31 × 5 =
  35. 35.16 × 5 =
  36. 36.75 × 5 =
  37. 37.25 × 5 =
  38. 38.45 × 50 =
  39. 39.31 × 50 =
  40. 40.47 × 50 =

Answer key

  1. 1750
  2. 390
  3. 3150
  4. 250
  5. 1650
  6. 3650
  7. 205
  8. 185
  9. 90
  10. 165
  11. 1850
  12. 4550
  13. 2400
  14. 425
  15. 320
  16. 85
  17. 215
  18. 350
  19. 2900
  20. 205
  21. 120
  22. 1200
  23. 280
  24. 305
  25. 110
  26. 70
  27. 420
  28. 280
  29. 285
  30. 245
  31. 395
  32. 1550
  33. 1500
  34. 155
  35. 80
  36. 375
  37. 125
  38. 2250
  39. 1550
  40. 2350

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