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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 100 · 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. 1.71 × 5 =
  2. 2.18 × 5 =
  3. 3.14 × 5 =
  4. 4.33 × 5 =
  5. 5.38 × 5 =
  6. 6.80 × 50 =
  7. 7.65 × 5 =
  8. 8.35 × 5 =
  9. 9.64 × 50 =
  10. 10.35 × 5 =
  11. 11.73 × 5 =
  12. 12.83 × 5 =
  13. 13.52 × 50 =
  14. 14.57 × 50 =
  15. 15.46 × 50 =
  16. 16.13 × 5 =
  17. 17.43 × 50 =
  18. 18.35 × 50 =
  19. 19.60 × 50 =
  20. 20.91 × 5 =
  21. 21.73 × 5 =
  22. 22.79 × 5 =
  23. 23.41 × 5 =
  24. 24.73 × 5 =
  25. 25.43 × 5 =
  26. 26.28 × 50 =
  27. 27.19 × 50 =
  28. 28.61 × 50 =
  29. 29.18 × 50 =
  30. 30.23 × 50 =
  31. 31.68 × 50 =
  32. 32.21 × 5 =
  33. 33.22 × 50 =
  34. 34.54 × 50 =
  35. 35.35 × 50 =
  36. 36.52 × 50 =
  37. 37.28 × 5 =
  38. 38.20 × 50 =
  39. 39.46 × 50 =
  40. 40.16 × 50 =

Answer key

  1. 355
  2. 90
  3. 70
  4. 165
  5. 190
  6. 4000
  7. 325
  8. 175
  9. 3200
  10. 175
  11. 365
  12. 415
  13. 2600
  14. 2850
  15. 2300
  16. 65
  17. 2150
  18. 1750
  19. 3000
  20. 455
  21. 365
  22. 395
  23. 205
  24. 365
  25. 215
  26. 1400
  27. 950
  28. 3050
  29. 900
  30. 1150
  31. 3400
  32. 105
  33. 1100
  34. 2700
  35. 1750
  36. 2600
  37. 140
  38. 1000
  39. 2300
  40. 800

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