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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 901 · 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. 1.15 × 50 =
  2. 2.51 × 5 =
  3. 3.85 × 50 =
  4. 4.55 × 5 =
  5. 5.67 × 5 =
  6. 6.21 × 50 =
  7. 7.25 × 5 =
  8. 8.72 × 50 =
  9. 9.57 × 5 =
  10. 10.37 × 50 =
  11. 11.75 × 5 =
  12. 12.89 × 50 =
  13. 13.81 × 5 =
  14. 14.43 × 50 =
  15. 15.67 × 50 =
  16. 16.36 × 5 =
  17. 17.52 × 5 =
  18. 18.13 × 5 =
  19. 19.61 × 5 =
  20. 20.67 × 5 =
  21. 21.31 × 50 =
  22. 22.49 × 5 =
  23. 23.83 × 50 =
  24. 24.67 × 5 =
  25. 25.70 × 50 =
  26. 26.96 × 50 =
  27. 27.18 × 5 =
  28. 28.43 × 50 =
  29. 29.41 × 50 =
  30. 30.92 × 50 =
  31. 31.15 × 50 =
  32. 32.62 × 50 =
  33. 33.95 × 5 =
  34. 34.96 × 50 =
  35. 35.33 × 5 =
  36. 36.54 × 5 =
  37. 37.80 × 50 =
  38. 38.22 × 50 =
  39. 39.37 × 5 =
  40. 40.69 × 5 =

Answer key

  1. 750
  2. 255
  3. 4250
  4. 275
  5. 335
  6. 1050
  7. 125
  8. 3600
  9. 285
  10. 1850
  11. 375
  12. 4450
  13. 405
  14. 2150
  15. 3350
  16. 180
  17. 260
  18. 65
  19. 305
  20. 335
  21. 1550
  22. 245
  23. 4150
  24. 335
  25. 3500
  26. 4800
  27. 90
  28. 2150
  29. 2050
  30. 4600
  31. 750
  32. 3100
  33. 475
  34. 4800
  35. 165
  36. 270
  37. 4000
  38. 1100
  39. 185
  40. 345

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