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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 917 · 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. 1.31 × 5 =
  2. 2.74 × 5 =
  3. 3.17 × 50 =
  4. 4.41 × 5 =
  5. 5.81 × 5 =
  6. 6.45 × 5 =
  7. 7.67 × 5 =
  8. 8.16 × 5 =
  9. 9.18 × 50 =
  10. 10.76 × 50 =
  11. 11.20 × 5 =
  12. 12.86 × 5 =
  13. 13.13 × 50 =
  14. 14.41 × 5 =
  15. 15.20 × 50 =
  16. 16.28 × 5 =
  17. 17.62 × 50 =
  18. 18.35 × 50 =
  19. 19.57 × 5 =
  20. 20.53 × 5 =
  21. 21.48 × 50 =
  22. 22.17 × 50 =
  23. 23.82 × 50 =
  24. 24.51 × 5 =
  25. 25.18 × 50 =
  26. 26.22 × 5 =
  27. 27.42 × 5 =
  28. 28.20 × 5 =
  29. 29.35 × 5 =
  30. 30.12 × 50 =
  31. 31.60 × 50 =
  32. 32.36 × 5 =
  33. 33.23 × 5 =
  34. 34.35 × 5 =
  35. 35.77 × 5 =
  36. 36.35 × 50 =
  37. 37.54 × 5 =
  38. 38.32 × 50 =
  39. 39.49 × 5 =
  40. 40.91 × 5 =

Answer key

  1. 155
  2. 370
  3. 850
  4. 205
  5. 405
  6. 225
  7. 335
  8. 80
  9. 900
  10. 3800
  11. 100
  12. 430
  13. 650
  14. 205
  15. 1000
  16. 140
  17. 3100
  18. 1750
  19. 285
  20. 265
  21. 2400
  22. 850
  23. 4100
  24. 255
  25. 900
  26. 110
  27. 210
  28. 100
  29. 175
  30. 600
  31. 3000
  32. 180
  33. 115
  34. 175
  35. 385
  36. 1750
  37. 270
  38. 1600
  39. 245
  40. 455

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