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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 91 · 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. 1.58 × 50 =
  2. 2.97 × 5 =
  3. 3.40 × 50 =
  4. 4.15 × 50 =
  5. 5.61 × 5 =
  6. 6.42 × 5 =
  7. 7.93 × 5 =
  8. 8.49 × 5 =
  9. 9.93 × 5 =
  10. 10.94 × 50 =
  11. 11.79 × 5 =
  12. 12.40 × 5 =
  13. 13.83 × 50 =
  14. 14.25 × 50 =
  15. 15.63 × 50 =
  16. 16.38 × 50 =
  17. 17.49 × 50 =
  18. 18.46 × 50 =
  19. 19.82 × 5 =
  20. 20.27 × 5 =
  21. 21.25 × 5 =
  22. 22.57 × 50 =
  23. 23.64 × 5 =
  24. 24.85 × 5 =
  25. 25.12 × 50 =
  26. 26.78 × 5 =
  27. 27.91 × 5 =
  28. 28.71 × 5 =
  29. 29.25 × 50 =
  30. 30.18 × 5 =
  31. 31.74 × 5 =
  32. 32.14 × 5 =
  33. 33.44 × 5 =
  34. 34.35 × 50 =
  35. 35.62 × 5 =
  36. 36.60 × 5 =
  37. 37.13 × 50 =
  38. 38.46 × 5 =
  39. 39.20 × 50 =
  40. 40.12 × 5 =

Answer key

  1. 2900
  2. 485
  3. 2000
  4. 750
  5. 305
  6. 210
  7. 465
  8. 245
  9. 465
  10. 4700
  11. 395
  12. 200
  13. 4150
  14. 1250
  15. 3150
  16. 1900
  17. 2450
  18. 2300
  19. 410
  20. 135
  21. 125
  22. 2850
  23. 320
  24. 425
  25. 600
  26. 390
  27. 455
  28. 355
  29. 1250
  30. 90
  31. 370
  32. 70
  33. 220
  34. 1750
  35. 310
  36. 300
  37. 650
  38. 230
  39. 1000
  40. 60

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