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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 36 · 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. 1.80 × 50 =
  2. 2.95 × 50 =
  3. 3.32 × 50 =
  4. 4.14 × 50 =
  5. 5.37 × 50 =
  6. 6.72 × 50 =
  7. 7.55 × 50 =
  8. 8.96 × 5 =
  9. 9.21 × 5 =
  10. 10.55 × 5 =
  11. 11.66 × 50 =
  12. 12.71 × 50 =
  13. 13.37 × 50 =
  14. 14.71 × 50 =
  15. 15.43 × 5 =
  16. 16.71 × 5 =
  17. 17.66 × 5 =
  18. 18.34 × 5 =
  19. 19.55 × 50 =
  20. 20.94 × 5 =
  21. 21.47 × 5 =
  22. 22.53 × 5 =
  23. 23.12 × 5 =
  24. 24.61 × 50 =
  25. 25.62 × 50 =
  26. 26.46 × 5 =
  27. 27.96 × 5 =
  28. 28.78 × 5 =
  29. 29.52 × 5 =
  30. 30.64 × 50 =
  31. 31.95 × 50 =
  32. 32.79 × 5 =
  33. 33.86 × 5 =
  34. 34.78 × 50 =
  35. 35.53 × 50 =
  36. 36.84 × 5 =
  37. 37.42 × 50 =
  38. 38.42 × 50 =
  39. 39.69 × 5 =
  40. 40.30 × 50 =

Answer key

  1. 4000
  2. 4750
  3. 1600
  4. 700
  5. 1850
  6. 3600
  7. 2750
  8. 480
  9. 105
  10. 275
  11. 3300
  12. 3550
  13. 1850
  14. 3550
  15. 215
  16. 355
  17. 330
  18. 170
  19. 2750
  20. 470
  21. 235
  22. 265
  23. 60
  24. 3050
  25. 3100
  26. 230
  27. 480
  28. 390
  29. 260
  30. 3200
  31. 4750
  32. 395
  33. 430
  34. 3900
  35. 2650
  36. 420
  37. 2100
  38. 2100
  39. 345
  40. 1500

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