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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 702 · 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. 1.86 × 50 =
  2. 2.92 × 50 =
  3. 3.33 × 50 =
  4. 4.44 × 5 =
  5. 5.31 × 50 =
  6. 6.15 × 5 =
  7. 7.70 × 5 =
  8. 8.53 × 50 =
  9. 9.15 × 50 =
  10. 10.13 × 5 =
  11. 11.42 × 5 =
  12. 12.41 × 50 =
  13. 13.60 × 50 =
  14. 14.79 × 5 =
  15. 15.81 × 5 =
  16. 16.31 × 50 =
  17. 17.71 × 5 =
  18. 18.76 × 50 =
  19. 19.44 × 5 =
  20. 20.31 × 50 =
  21. 21.36 × 5 =
  22. 22.95 × 5 =
  23. 23.17 × 50 =
  24. 24.95 × 50 =
  25. 25.39 × 5 =
  26. 26.16 × 5 =
  27. 27.43 × 5 =
  28. 28.23 × 50 =
  29. 29.51 × 50 =
  30. 30.75 × 5 =
  31. 31.43 × 5 =
  32. 32.78 × 5 =
  33. 33.88 × 50 =
  34. 34.98 × 50 =
  35. 35.19 × 50 =
  36. 36.27 × 50 =
  37. 37.16 × 5 =
  38. 38.33 × 50 =
  39. 39.72 × 5 =
  40. 40.19 × 5 =

Answer key

  1. 4300
  2. 4600
  3. 1650
  4. 220
  5. 1550
  6. 75
  7. 350
  8. 2650
  9. 750
  10. 65
  11. 210
  12. 2050
  13. 3000
  14. 395
  15. 405
  16. 1550
  17. 355
  18. 3800
  19. 220
  20. 1550
  21. 180
  22. 475
  23. 850
  24. 4750
  25. 195
  26. 80
  27. 215
  28. 1150
  29. 2550
  30. 375
  31. 215
  32. 390
  33. 4400
  34. 4900
  35. 950
  36. 1350
  37. 80
  38. 1650
  39. 360
  40. 95

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