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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 341 · 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. 1.62 × 50 =
  2. 2.63 × 50 =
  3. 3.22 × 50 =
  4. 4.92 × 50 =
  5. 5.29 × 5 =
  6. 6.77 × 50 =
  7. 7.56 × 50 =
  8. 8.67 × 5 =
  9. 9.98 × 5 =
  10. 10.55 × 5 =
  11. 11.80 × 5 =
  12. 12.19 × 50 =
  13. 13.38 × 50 =
  14. 14.62 × 5 =
  15. 15.67 × 50 =
  16. 16.83 × 50 =
  17. 17.19 × 5 =
  18. 18.72 × 50 =
  19. 19.38 × 50 =
  20. 20.90 × 5 =
  21. 21.62 × 5 =
  22. 22.75 × 5 =
  23. 23.25 × 5 =
  24. 24.31 × 5 =
  25. 25.94 × 5 =
  26. 26.12 × 50 =
  27. 27.91 × 5 =
  28. 28.46 × 5 =
  29. 29.52 × 50 =
  30. 30.63 × 5 =
  31. 31.96 × 5 =
  32. 32.48 × 50 =
  33. 33.89 × 50 =
  34. 34.28 × 5 =
  35. 35.50 × 50 =
  36. 36.20 × 5 =
  37. 37.38 × 5 =
  38. 38.65 × 5 =
  39. 39.35 × 50 =
  40. 40.14 × 5 =

Answer key

  1. 3100
  2. 3150
  3. 1100
  4. 4600
  5. 145
  6. 3850
  7. 2800
  8. 335
  9. 490
  10. 275
  11. 400
  12. 950
  13. 1900
  14. 310
  15. 3350
  16. 4150
  17. 95
  18. 3600
  19. 1900
  20. 450
  21. 310
  22. 375
  23. 125
  24. 155
  25. 470
  26. 600
  27. 455
  28. 230
  29. 2600
  30. 315
  31. 480
  32. 2400
  33. 4450
  34. 140
  35. 2500
  36. 100
  37. 190
  38. 325
  39. 1750
  40. 70

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