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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 977 · 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. 1.39 × 50 =
  2. 2.59 × 50 =
  3. 3.33 × 5 =
  4. 4.26 × 5 =
  5. 5.32 × 5 =
  6. 6.33 × 5 =
  7. 7.52 × 5 =
  8. 8.88 × 5 =
  9. 9.20 × 5 =
  10. 10.32 × 50 =
  11. 11.39 × 50 =
  12. 12.19 × 5 =
  13. 13.68 × 50 =
  14. 14.34 × 5 =
  15. 15.59 × 50 =
  16. 16.79 × 5 =
  17. 17.66 × 50 =
  18. 18.90 × 50 =
  19. 19.92 × 5 =
  20. 20.25 × 5 =
  21. 21.35 × 50 =
  22. 22.42 × 5 =
  23. 23.20 × 5 =
  24. 24.16 × 5 =
  25. 25.92 × 50 =
  26. 26.85 × 50 =
  27. 27.33 × 5 =
  28. 28.44 × 5 =
  29. 29.94 × 5 =
  30. 30.12 × 50 =
  31. 31.56 × 50 =
  32. 32.67 × 50 =
  33. 33.62 × 5 =
  34. 34.16 × 5 =
  35. 35.33 × 5 =
  36. 36.83 × 5 =
  37. 37.31 × 5 =
  38. 38.96 × 5 =
  39. 39.62 × 5 =
  40. 40.31 × 5 =

Answer key

  1. 1950
  2. 2950
  3. 165
  4. 130
  5. 160
  6. 165
  7. 260
  8. 440
  9. 100
  10. 1600
  11. 1950
  12. 95
  13. 3400
  14. 170
  15. 2950
  16. 395
  17. 3300
  18. 4500
  19. 460
  20. 125
  21. 1750
  22. 210
  23. 100
  24. 80
  25. 4600
  26. 4250
  27. 165
  28. 220
  29. 470
  30. 600
  31. 2800
  32. 3350
  33. 310
  34. 80
  35. 165
  36. 415
  37. 155
  38. 480
  39. 310
  40. 155

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