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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 723 · 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. 1.21 × 5 =
  2. 2.63 × 50 =
  3. 3.71 × 5 =
  4. 4.67 × 50 =
  5. 5.82 × 50 =
  6. 6.87 × 5 =
  7. 7.79 × 50 =
  8. 8.69 × 50 =
  9. 9.56 × 50 =
  10. 10.94 × 50 =
  11. 11.59 × 5 =
  12. 12.98 × 50 =
  13. 13.89 × 5 =
  14. 14.54 × 50 =
  15. 15.21 × 5 =
  16. 16.15 × 50 =
  17. 17.93 × 5 =
  18. 18.23 × 50 =
  19. 19.96 × 5 =
  20. 20.34 × 5 =
  21. 21.81 × 5 =
  22. 22.87 × 5 =
  23. 23.91 × 5 =
  24. 24.76 × 50 =
  25. 25.65 × 5 =
  26. 26.25 × 50 =
  27. 27.37 × 5 =
  28. 28.74 × 5 =
  29. 29.95 × 50 =
  30. 30.31 × 5 =
  31. 31.26 × 5 =
  32. 32.33 × 5 =
  33. 33.67 × 5 =
  34. 34.23 × 50 =
  35. 35.30 × 5 =
  36. 36.79 × 5 =
  37. 37.83 × 50 =
  38. 38.85 × 50 =
  39. 39.22 × 5 =
  40. 40.28 × 50 =

Answer key

  1. 105
  2. 3150
  3. 355
  4. 3350
  5. 4100
  6. 435
  7. 3950
  8. 3450
  9. 2800
  10. 4700
  11. 295
  12. 4900
  13. 445
  14. 2700
  15. 105
  16. 750
  17. 465
  18. 1150
  19. 480
  20. 170
  21. 405
  22. 435
  23. 455
  24. 3800
  25. 325
  26. 1250
  27. 185
  28. 370
  29. 4750
  30. 155
  31. 130
  32. 165
  33. 335
  34. 1150
  35. 150
  36. 395
  37. 4150
  38. 4250
  39. 110
  40. 1400

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