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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 41 · 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. 1.70 × 50 =
  2. 2.80 × 5 =
  3. 3.32 × 50 =
  4. 4.57 × 5 =
  5. 5.36 × 50 =
  6. 6.51 × 50 =
  7. 7.63 × 50 =
  8. 8.43 × 50 =
  9. 9.96 × 50 =
  10. 10.90 × 5 =
  11. 11.86 × 5 =
  12. 12.98 × 5 =
  13. 13.88 × 50 =
  14. 14.21 × 5 =
  15. 15.42 × 50 =
  16. 16.13 × 5 =
  17. 17.50 × 50 =
  18. 18.82 × 5 =
  19. 19.30 × 5 =
  20. 20.28 × 5 =
  21. 21.75 × 5 =
  22. 22.34 × 5 =
  23. 23.30 × 5 =
  24. 24.81 × 50 =
  25. 25.30 × 5 =
  26. 26.38 × 50 =
  27. 27.52 × 5 =
  28. 28.31 × 50 =
  29. 29.34 × 5 =
  30. 30.18 × 50 =
  31. 31.95 × 5 =
  32. 32.41 × 50 =
  33. 33.36 × 5 =
  34. 34.76 × 50 =
  35. 35.74 × 50 =
  36. 36.82 × 50 =
  37. 37.37 × 50 =
  38. 38.15 × 5 =
  39. 39.55 × 5 =
  40. 40.30 × 50 =

Answer key

  1. 3500
  2. 400
  3. 1600
  4. 285
  5. 1800
  6. 2550
  7. 3150
  8. 2150
  9. 4800
  10. 450
  11. 430
  12. 490
  13. 4400
  14. 105
  15. 2100
  16. 65
  17. 2500
  18. 410
  19. 150
  20. 140
  21. 375
  22. 170
  23. 150
  24. 4050
  25. 150
  26. 1900
  27. 260
  28. 1550
  29. 170
  30. 900
  31. 475
  32. 2050
  33. 180
  34. 3800
  35. 3700
  36. 4100
  37. 1850
  38. 75
  39. 275
  40. 1500

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