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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 749 · 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. 1.90 × 50 =
  2. 2.65 × 5 =
  3. 3.51 × 50 =
  4. 4.36 × 5 =
  5. 5.39 × 5 =
  6. 6.87 × 50 =
  7. 7.97 × 50 =
  8. 8.33 × 50 =
  9. 9.22 × 50 =
  10. 10.85 × 50 =
  11. 11.79 × 50 =
  12. 12.65 × 5 =
  13. 13.43 × 50 =
  14. 14.38 × 50 =
  15. 15.27 × 50 =
  16. 16.86 × 50 =
  17. 17.23 × 5 =
  18. 18.91 × 50 =
  19. 19.81 × 50 =
  20. 20.72 × 50 =
  21. 21.12 × 5 =
  22. 22.87 × 5 =
  23. 23.15 × 5 =
  24. 24.61 × 50 =
  25. 25.93 × 5 =
  26. 26.35 × 5 =
  27. 27.56 × 5 =
  28. 28.46 × 50 =
  29. 29.45 × 5 =
  30. 30.41 × 50 =
  31. 31.40 × 5 =
  32. 32.57 × 50 =
  33. 33.15 × 50 =
  34. 34.25 × 50 =
  35. 35.31 × 50 =
  36. 36.97 × 5 =
  37. 37.18 × 5 =
  38. 38.96 × 50 =
  39. 39.27 × 5 =
  40. 40.20 × 5 =

Answer key

  1. 4500
  2. 325
  3. 2550
  4. 180
  5. 195
  6. 4350
  7. 4850
  8. 1650
  9. 1100
  10. 4250
  11. 3950
  12. 325
  13. 2150
  14. 1900
  15. 1350
  16. 4300
  17. 115
  18. 4550
  19. 4050
  20. 3600
  21. 60
  22. 435
  23. 75
  24. 3050
  25. 465
  26. 175
  27. 280
  28. 2300
  29. 225
  30. 2050
  31. 200
  32. 2850
  33. 750
  34. 1250
  35. 1550
  36. 485
  37. 90
  38. 4800
  39. 135
  40. 100

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