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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 713 · 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. 1.48 × 5 =
  2. 2.43 × 5 =
  3. 3.57 × 5 =
  4. 4.65 × 5 =
  5. 5.27 × 50 =
  6. 6.49 × 5 =
  7. 7.39 × 50 =
  8. 8.68 × 5 =
  9. 9.90 × 50 =
  10. 10.69 × 5 =
  11. 11.29 × 5 =
  12. 12.19 × 50 =
  13. 13.52 × 50 =
  14. 14.76 × 50 =
  15. 15.16 × 5 =
  16. 16.24 × 50 =
  17. 17.51 × 50 =
  18. 18.22 × 5 =
  19. 19.38 × 5 =
  20. 20.93 × 50 =
  21. 21.92 × 5 =
  22. 22.43 × 5 =
  23. 23.12 × 50 =
  24. 24.82 × 5 =
  25. 25.29 × 5 =
  26. 26.67 × 50 =
  27. 27.96 × 50 =
  28. 28.83 × 5 =
  29. 29.56 × 5 =
  30. 30.39 × 5 =
  31. 31.18 × 50 =
  32. 32.26 × 5 =
  33. 33.63 × 50 =
  34. 34.19 × 50 =
  35. 35.19 × 5 =
  36. 36.63 × 5 =
  37. 37.78 × 5 =
  38. 38.13 × 50 =
  39. 39.72 × 5 =
  40. 40.37 × 50 =

Answer key

  1. 240
  2. 215
  3. 285
  4. 325
  5. 1350
  6. 245
  7. 1950
  8. 340
  9. 4500
  10. 345
  11. 145
  12. 950
  13. 2600
  14. 3800
  15. 80
  16. 1200
  17. 2550
  18. 110
  19. 190
  20. 4650
  21. 460
  22. 215
  23. 600
  24. 410
  25. 145
  26. 3350
  27. 4800
  28. 415
  29. 280
  30. 195
  31. 900
  32. 130
  33. 3150
  34. 950
  35. 95
  36. 315
  37. 390
  38. 650
  39. 360
  40. 1850

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