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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 929 · 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. 1.98 × 5 =
  2. 2.19 × 5 =
  3. 3.38 × 50 =
  4. 4.72 × 5 =
  5. 5.96 × 50 =
  6. 6.79 × 50 =
  7. 7.22 × 50 =
  8. 8.36 × 5 =
  9. 9.69 × 5 =
  10. 10.83 × 5 =
  11. 11.16 × 5 =
  12. 12.75 × 5 =
  13. 13.44 × 5 =
  14. 14.34 × 5 =
  15. 15.31 × 50 =
  16. 16.19 × 5 =
  17. 17.72 × 50 =
  18. 18.71 × 50 =
  19. 19.63 × 5 =
  20. 20.21 × 50 =
  21. 21.90 × 5 =
  22. 22.79 × 5 =
  23. 23.75 × 50 =
  24. 24.49 × 5 =
  25. 25.42 × 50 =
  26. 26.40 × 5 =
  27. 27.42 × 5 =
  28. 28.57 × 5 =
  29. 29.28 × 50 =
  30. 30.35 × 5 =
  31. 31.60 × 50 =
  32. 32.88 × 50 =
  33. 33.34 × 5 =
  34. 34.35 × 50 =
  35. 35.86 × 5 =
  36. 36.72 × 50 =
  37. 37.71 × 50 =
  38. 38.51 × 50 =
  39. 39.56 × 5 =
  40. 40.69 × 5 =

Answer key

  1. 490
  2. 95
  3. 1900
  4. 360
  5. 4800
  6. 3950
  7. 1100
  8. 180
  9. 345
  10. 415
  11. 80
  12. 375
  13. 220
  14. 170
  15. 1550
  16. 95
  17. 3600
  18. 3550
  19. 315
  20. 1050
  21. 450
  22. 395
  23. 3750
  24. 245
  25. 2100
  26. 200
  27. 210
  28. 285
  29. 1400
  30. 175
  31. 3000
  32. 4400
  33. 170
  34. 1750
  35. 430
  36. 3600
  37. 3550
  38. 2550
  39. 280
  40. 345

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