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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 322 · 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. 1.78 × 5 =
  2. 2.71 × 5 =
  3. 3.91 × 50 =
  4. 4.62 × 5 =
  5. 5.27 × 5 =
  6. 6.21 × 50 =
  7. 7.98 × 50 =
  8. 8.13 × 50 =
  9. 9.37 × 50 =
  10. 10.52 × 5 =
  11. 11.73 × 5 =
  12. 12.45 × 50 =
  13. 13.94 × 5 =
  14. 14.46 × 5 =
  15. 15.28 × 5 =
  16. 16.32 × 5 =
  17. 17.75 × 50 =
  18. 18.30 × 5 =
  19. 19.54 × 50 =
  20. 20.84 × 50 =
  21. 21.18 × 50 =
  22. 22.77 × 50 =
  23. 23.35 × 50 =
  24. 24.83 × 5 =
  25. 25.37 × 50 =
  26. 26.32 × 50 =
  27. 27.94 × 5 =
  28. 28.68 × 5 =
  29. 29.57 × 5 =
  30. 30.54 × 50 =
  31. 31.27 × 50 =
  32. 32.19 × 5 =
  33. 33.29 × 50 =
  34. 34.90 × 50 =
  35. 35.19 × 50 =
  36. 36.23 × 5 =
  37. 37.20 × 5 =
  38. 38.82 × 50 =
  39. 39.25 × 5 =
  40. 40.56 × 5 =

Answer key

  1. 390
  2. 355
  3. 4550
  4. 310
  5. 135
  6. 1050
  7. 4900
  8. 650
  9. 1850
  10. 260
  11. 365
  12. 2250
  13. 470
  14. 230
  15. 140
  16. 160
  17. 3750
  18. 150
  19. 2700
  20. 4200
  21. 900
  22. 3850
  23. 1750
  24. 415
  25. 1850
  26. 1600
  27. 470
  28. 340
  29. 285
  30. 2700
  31. 1350
  32. 95
  33. 1450
  34. 4500
  35. 950
  36. 115
  37. 100
  38. 4100
  39. 125
  40. 280

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