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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 329 · 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. 1.15 × 5 =
  2. 2.29 × 50 =
  3. 3.64 × 5 =
  4. 4.23 × 5 =
  5. 5.82 × 50 =
  6. 6.73 × 50 =
  7. 7.94 × 5 =
  8. 8.35 × 5 =
  9. 9.56 × 50 =
  10. 10.20 × 5 =
  11. 11.82 × 50 =
  12. 12.87 × 5 =
  13. 13.18 × 5 =
  14. 14.26 × 5 =
  15. 15.82 × 5 =
  16. 16.25 × 5 =
  17. 17.28 × 5 =
  18. 18.17 × 50 =
  19. 19.59 × 5 =
  20. 20.39 × 5 =
  21. 21.54 × 5 =
  22. 22.77 × 5 =
  23. 23.94 × 5 =
  24. 24.22 × 50 =
  25. 25.97 × 5 =
  26. 26.23 × 50 =
  27. 27.39 × 5 =
  28. 28.15 × 5 =
  29. 29.96 × 5 =
  30. 30.29 × 5 =
  31. 31.28 × 5 =
  32. 32.79 × 50 =
  33. 33.13 × 50 =
  34. 34.36 × 50 =
  35. 35.43 × 50 =
  36. 36.56 × 5 =
  37. 37.27 × 5 =
  38. 38.58 × 50 =
  39. 39.63 × 5 =
  40. 40.62 × 50 =

Answer key

  1. 75
  2. 1450
  3. 320
  4. 115
  5. 4100
  6. 3650
  7. 470
  8. 175
  9. 2800
  10. 100
  11. 4100
  12. 435
  13. 90
  14. 130
  15. 410
  16. 125
  17. 140
  18. 850
  19. 295
  20. 195
  21. 270
  22. 385
  23. 470
  24. 1100
  25. 485
  26. 1150
  27. 195
  28. 75
  29. 480
  30. 145
  31. 140
  32. 3950
  33. 650
  34. 1800
  35. 2150
  36. 280
  37. 135
  38. 2900
  39. 315
  40. 3100

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