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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 128 · 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. 1.30 × 50 =
  2. 2.78 × 50 =
  3. 3.39 × 5 =
  4. 4.33 × 5 =
  5. 5.20 × 50 =
  6. 6.83 × 5 =
  7. 7.35 × 50 =
  8. 8.36 × 50 =
  9. 9.96 × 50 =
  10. 10.18 × 5 =
  11. 11.91 × 5 =
  12. 12.41 × 5 =
  13. 13.45 × 50 =
  14. 14.72 × 50 =
  15. 15.30 × 50 =
  16. 16.76 × 5 =
  17. 17.74 × 5 =
  18. 18.96 × 50 =
  19. 19.25 × 5 =
  20. 20.41 × 5 =
  21. 21.80 × 50 =
  22. 22.65 × 5 =
  23. 23.48 × 50 =
  24. 24.16 × 50 =
  25. 25.88 × 50 =
  26. 26.56 × 50 =
  27. 27.44 × 5 =
  28. 28.30 × 5 =
  29. 29.85 × 50 =
  30. 30.56 × 5 =
  31. 31.27 × 5 =
  32. 32.63 × 5 =
  33. 33.61 × 50 =
  34. 34.51 × 5 =
  35. 35.31 × 5 =
  36. 36.35 × 5 =
  37. 37.51 × 5 =
  38. 38.62 × 5 =
  39. 39.80 × 50 =
  40. 40.13 × 5 =

Answer key

  1. 1500
  2. 3900
  3. 195
  4. 165
  5. 1000
  6. 415
  7. 1750
  8. 1800
  9. 4800
  10. 90
  11. 455
  12. 205
  13. 2250
  14. 3600
  15. 1500
  16. 380
  17. 370
  18. 4800
  19. 125
  20. 205
  21. 4000
  22. 325
  23. 2400
  24. 800
  25. 4400
  26. 2800
  27. 220
  28. 150
  29. 4250
  30. 280
  31. 135
  32. 315
  33. 3050
  34. 255
  35. 155
  36. 175
  37. 255
  38. 310
  39. 4000
  40. 65

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