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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 642 · 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. 1.18 × 50 =
  2. 2.73 × 50 =
  3. 3.81 × 50 =
  4. 4.19 × 5 =
  5. 5.53 × 5 =
  6. 6.96 × 50 =
  7. 7.95 × 5 =
  8. 8.26 × 50 =
  9. 9.73 × 50 =
  10. 10.52 × 50 =
  11. 11.67 × 50 =
  12. 12.49 × 5 =
  13. 13.39 × 50 =
  14. 14.49 × 50 =
  15. 15.36 × 5 =
  16. 16.47 × 5 =
  17. 17.82 × 5 =
  18. 18.72 × 50 =
  19. 19.56 × 50 =
  20. 20.86 × 5 =
  21. 21.53 × 50 =
  22. 22.24 × 50 =
  23. 23.13 × 5 =
  24. 24.46 × 50 =
  25. 25.89 × 5 =
  26. 26.97 × 50 =
  27. 27.80 × 50 =
  28. 28.50 × 50 =
  29. 29.77 × 5 =
  30. 30.27 × 5 =
  31. 31.58 × 5 =
  32. 32.76 × 5 =
  33. 33.67 × 50 =
  34. 34.46 × 50 =
  35. 35.29 × 5 =
  36. 36.37 × 50 =
  37. 37.54 × 50 =
  38. 38.39 × 50 =
  39. 39.37 × 5 =
  40. 40.70 × 5 =

Answer key

  1. 900
  2. 3650
  3. 4050
  4. 95
  5. 265
  6. 4800
  7. 475
  8. 1300
  9. 3650
  10. 2600
  11. 3350
  12. 245
  13. 1950
  14. 2450
  15. 180
  16. 235
  17. 410
  18. 3600
  19. 2800
  20. 430
  21. 2650
  22. 1200
  23. 65
  24. 2300
  25. 445
  26. 4850
  27. 4000
  28. 2500
  29. 385
  30. 135
  31. 290
  32. 380
  33. 3350
  34. 2300
  35. 145
  36. 1850
  37. 2700
  38. 1950
  39. 185
  40. 350

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