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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 683 · 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. 1.50 × 5 =
  2. 2.31 × 50 =
  3. 3.31 × 5 =
  4. 4.49 × 50 =
  5. 5.33 × 50 =
  6. 6.38 × 5 =
  7. 7.26 × 50 =
  8. 8.89 × 50 =
  9. 9.87 × 50 =
  10. 10.30 × 50 =
  11. 11.43 × 50 =
  12. 12.81 × 5 =
  13. 13.52 × 5 =
  14. 14.44 × 50 =
  15. 15.28 × 50 =
  16. 16.31 × 50 =
  17. 17.37 × 50 =
  18. 18.63 × 50 =
  19. 19.17 × 5 =
  20. 20.97 × 5 =
  21. 21.40 × 5 =
  22. 22.70 × 50 =
  23. 23.93 × 50 =
  24. 24.64 × 5 =
  25. 25.12 × 5 =
  26. 26.12 × 5 =
  27. 27.44 × 5 =
  28. 28.77 × 50 =
  29. 29.22 × 5 =
  30. 30.15 × 5 =
  31. 31.92 × 50 =
  32. 32.31 × 50 =
  33. 33.41 × 50 =
  34. 34.90 × 5 =
  35. 35.12 × 50 =
  36. 36.85 × 50 =
  37. 37.34 × 50 =
  38. 38.30 × 50 =
  39. 39.79 × 50 =
  40. 40.54 × 5 =

Answer key

  1. 250
  2. 1550
  3. 155
  4. 2450
  5. 1650
  6. 190
  7. 1300
  8. 4450
  9. 4350
  10. 1500
  11. 2150
  12. 405
  13. 260
  14. 2200
  15. 1400
  16. 1550
  17. 1850
  18. 3150
  19. 85
  20. 485
  21. 200
  22. 3500
  23. 4650
  24. 320
  25. 60
  26. 60
  27. 220
  28. 3850
  29. 110
  30. 75
  31. 4600
  32. 1550
  33. 2050
  34. 450
  35. 600
  36. 4250
  37. 1700
  38. 1500
  39. 3950
  40. 270

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