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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 519 · 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. 1.63 × 5 =
  2. 2.20 × 5 =
  3. 3.90 × 5 =
  4. 4.73 × 50 =
  5. 5.12 × 5 =
  6. 6.39 × 5 =
  7. 7.74 × 50 =
  8. 8.45 × 5 =
  9. 9.20 × 5 =
  10. 10.28 × 50 =
  11. 11.88 × 5 =
  12. 12.32 × 50 =
  13. 13.86 × 5 =
  14. 14.59 × 50 =
  15. 15.71 × 5 =
  16. 16.49 × 50 =
  17. 17.33 × 50 =
  18. 18.69 × 5 =
  19. 19.26 × 50 =
  20. 20.36 × 5 =
  21. 21.61 × 5 =
  22. 22.94 × 50 =
  23. 23.26 × 50 =
  24. 24.22 × 5 =
  25. 25.62 × 5 =
  26. 26.72 × 5 =
  27. 27.33 × 5 =
  28. 28.33 × 5 =
  29. 29.38 × 50 =
  30. 30.40 × 50 =
  31. 31.79 × 50 =
  32. 32.50 × 5 =
  33. 33.62 × 50 =
  34. 34.15 × 50 =
  35. 35.86 × 50 =
  36. 36.15 × 50 =
  37. 37.23 × 5 =
  38. 38.31 × 5 =
  39. 39.64 × 5 =
  40. 40.76 × 50 =

Answer key

  1. 315
  2. 100
  3. 450
  4. 3650
  5. 60
  6. 195
  7. 3700
  8. 225
  9. 100
  10. 1400
  11. 440
  12. 1600
  13. 430
  14. 2950
  15. 355
  16. 2450
  17. 1650
  18. 345
  19. 1300
  20. 180
  21. 305
  22. 4700
  23. 1300
  24. 110
  25. 310
  26. 360
  27. 165
  28. 165
  29. 1900
  30. 2000
  31. 3950
  32. 250
  33. 3100
  34. 750
  35. 4300
  36. 750
  37. 115
  38. 155
  39. 320
  40. 3800

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