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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 998 · 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. 1.65 × 5 =
  2. 2.34 × 50 =
  3. 3.73 × 5 =
  4. 4.42 × 50 =
  5. 5.85 × 5 =
  6. 6.54 × 5 =
  7. 7.32 × 5 =
  8. 8.90 × 50 =
  9. 9.57 × 5 =
  10. 10.98 × 5 =
  11. 11.15 × 50 =
  12. 12.44 × 50 =
  13. 13.31 × 5 =
  14. 14.17 × 50 =
  15. 15.26 × 50 =
  16. 16.92 × 50 =
  17. 17.45 × 5 =
  18. 18.79 × 50 =
  19. 19.58 × 5 =
  20. 20.27 × 5 =
  21. 21.46 × 50 =
  22. 22.13 × 5 =
  23. 23.95 × 50 =
  24. 24.57 × 5 =
  25. 25.59 × 50 =
  26. 26.22 × 50 =
  27. 27.85 × 5 =
  28. 28.87 × 50 =
  29. 29.35 × 50 =
  30. 30.66 × 50 =
  31. 31.29 × 5 =
  32. 32.98 × 5 =
  33. 33.34 × 50 =
  34. 34.32 × 5 =
  35. 35.24 × 5 =
  36. 36.79 × 5 =
  37. 37.17 × 50 =
  38. 38.89 × 50 =
  39. 39.83 × 5 =
  40. 40.56 × 5 =

Answer key

  1. 325
  2. 1700
  3. 365
  4. 2100
  5. 425
  6. 270
  7. 160
  8. 4500
  9. 285
  10. 490
  11. 750
  12. 2200
  13. 155
  14. 850
  15. 1300
  16. 4600
  17. 225
  18. 3950
  19. 290
  20. 135
  21. 2300
  22. 65
  23. 4750
  24. 285
  25. 2950
  26. 1100
  27. 425
  28. 4350
  29. 1750
  30. 3300
  31. 145
  32. 490
  33. 1700
  34. 160
  35. 120
  36. 395
  37. 850
  38. 4450
  39. 415
  40. 280

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