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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 871 · 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. 1.53 × 5 =
  2. 2.89 × 5 =
  3. 3.31 × 5 =
  4. 4.65 × 5 =
  5. 5.81 × 5 =
  6. 6.29 × 5 =
  7. 7.86 × 5 =
  8. 8.26 × 50 =
  9. 9.73 × 5 =
  10. 10.18 × 50 =
  11. 11.32 × 50 =
  12. 12.31 × 50 =
  13. 13.78 × 50 =
  14. 14.85 × 5 =
  15. 15.64 × 50 =
  16. 16.21 × 5 =
  17. 17.39 × 5 =
  18. 18.60 × 50 =
  19. 19.36 × 5 =
  20. 20.26 × 5 =
  21. 21.19 × 50 =
  22. 22.27 × 5 =
  23. 23.56 × 50 =
  24. 24.82 × 5 =
  25. 25.32 × 50 =
  26. 26.81 × 5 =
  27. 27.34 × 50 =
  28. 28.17 × 5 =
  29. 29.60 × 50 =
  30. 30.38 × 50 =
  31. 31.12 × 5 =
  32. 32.65 × 5 =
  33. 33.38 × 50 =
  34. 34.52 × 50 =
  35. 35.70 × 5 =
  36. 36.48 × 50 =
  37. 37.40 × 50 =
  38. 38.28 × 5 =
  39. 39.16 × 5 =
  40. 40.61 × 5 =

Answer key

  1. 265
  2. 445
  3. 155
  4. 325
  5. 405
  6. 145
  7. 430
  8. 1300
  9. 365
  10. 900
  11. 1600
  12. 1550
  13. 3900
  14. 425
  15. 3200
  16. 105
  17. 195
  18. 3000
  19. 180
  20. 130
  21. 950
  22. 135
  23. 2800
  24. 410
  25. 1600
  26. 405
  27. 1700
  28. 85
  29. 3000
  30. 1900
  31. 60
  32. 325
  33. 1900
  34. 2600
  35. 350
  36. 2400
  37. 2000
  38. 140
  39. 80
  40. 305

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