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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 315 · 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 × 50 =
  2. 2.51 × 50 =
  3. 3.59 × 5 =
  4. 4.79 × 5 =
  5. 5.66 × 5 =
  6. 6.49 × 5 =
  7. 7.16 × 5 =
  8. 8.92 × 50 =
  9. 9.14 × 50 =
  10. 10.43 × 50 =
  11. 11.86 × 5 =
  12. 12.80 × 50 =
  13. 13.87 × 50 =
  14. 14.61 × 5 =
  15. 15.65 × 5 =
  16. 16.90 × 5 =
  17. 17.15 × 5 =
  18. 18.30 × 5 =
  19. 19.90 × 5 =
  20. 20.55 × 50 =
  21. 21.51 × 5 =
  22. 22.51 × 5 =
  23. 23.80 × 50 =
  24. 24.19 × 50 =
  25. 25.31 × 5 =
  26. 26.43 × 5 =
  27. 27.95 × 5 =
  28. 28.19 × 5 =
  29. 29.30 × 5 =
  30. 30.39 × 50 =
  31. 31.39 × 50 =
  32. 32.78 × 5 =
  33. 33.93 × 50 =
  34. 34.49 × 50 =
  35. 35.38 × 5 =
  36. 36.68 × 5 =
  37. 37.56 × 50 =
  38. 38.63 × 50 =
  39. 39.83 × 5 =
  40. 40.18 × 50 =

Answer key

  1. 2050
  2. 2550
  3. 295
  4. 395
  5. 330
  6. 245
  7. 80
  8. 4600
  9. 700
  10. 2150
  11. 430
  12. 4000
  13. 4350
  14. 305
  15. 325
  16. 450
  17. 75
  18. 150
  19. 450
  20. 2750
  21. 255
  22. 255
  23. 4000
  24. 950
  25. 155
  26. 215
  27. 475
  28. 95
  29. 150
  30. 1950
  31. 1950
  32. 390
  33. 4650
  34. 2450
  35. 190
  36. 340
  37. 2800
  38. 3150
  39. 415
  40. 900

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