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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 202 · 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. 1.18 × 5 =
  2. 2.74 × 5 =
  3. 3.74 × 5 =
  4. 4.38 × 5 =
  5. 5.58 × 50 =
  6. 6.79 × 5 =
  7. 7.67 × 50 =
  8. 8.21 × 50 =
  9. 9.63 × 50 =
  10. 10.24 × 50 =
  11. 11.96 × 50 =
  12. 12.51 × 5 =
  13. 13.22 × 5 =
  14. 14.70 × 50 =
  15. 15.97 × 5 =
  16. 16.45 × 50 =
  17. 17.96 × 50 =
  18. 18.82 × 50 =
  19. 19.51 × 5 =
  20. 20.57 × 5 =
  21. 21.49 × 50 =
  22. 22.63 × 5 =
  23. 23.85 × 50 =
  24. 24.41 × 5 =
  25. 25.53 × 50 =
  26. 26.41 × 5 =
  27. 27.81 × 5 =
  28. 28.50 × 50 =
  29. 29.29 × 5 =
  30. 30.82 × 50 =
  31. 31.60 × 50 =
  32. 32.42 × 50 =
  33. 33.70 × 50 =
  34. 34.22 × 5 =
  35. 35.14 × 5 =
  36. 36.67 × 5 =
  37. 37.73 × 50 =
  38. 38.77 × 5 =
  39. 39.35 × 50 =
  40. 40.46 × 5 =

Answer key

  1. 90
  2. 370
  3. 370
  4. 190
  5. 2900
  6. 395
  7. 3350
  8. 1050
  9. 3150
  10. 1200
  11. 4800
  12. 255
  13. 110
  14. 3500
  15. 485
  16. 2250
  17. 4800
  18. 4100
  19. 255
  20. 285
  21. 2450
  22. 315
  23. 4250
  24. 205
  25. 2650
  26. 205
  27. 405
  28. 2500
  29. 145
  30. 4100
  31. 3000
  32. 2100
  33. 3500
  34. 110
  35. 70
  36. 335
  37. 3650
  38. 385
  39. 1750
  40. 230

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