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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 429 · 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. 1.87 × 5 =
  2. 2.26 × 5 =
  3. 3.69 × 5 =
  4. 4.63 × 50 =
  5. 5.50 × 50 =
  6. 6.21 × 5 =
  7. 7.81 × 5 =
  8. 8.39 × 50 =
  9. 9.49 × 50 =
  10. 10.36 × 5 =
  11. 11.30 × 50 =
  12. 12.24 × 50 =
  13. 13.98 × 5 =
  14. 14.65 × 5 =
  15. 15.83 × 5 =
  16. 16.48 × 5 =
  17. 17.89 × 5 =
  18. 18.23 × 5 =
  19. 19.15 × 5 =
  20. 20.76 × 5 =
  21. 21.69 × 5 =
  22. 22.81 × 5 =
  23. 23.54 × 50 =
  24. 24.15 × 50 =
  25. 25.59 × 5 =
  26. 26.60 × 50 =
  27. 27.51 × 5 =
  28. 28.57 × 5 =
  29. 29.34 × 5 =
  30. 30.48 × 5 =
  31. 31.81 × 50 =
  32. 32.96 × 50 =
  33. 33.33 × 50 =
  34. 34.87 × 50 =
  35. 35.83 × 5 =
  36. 36.37 × 5 =
  37. 37.48 × 50 =
  38. 38.71 × 50 =
  39. 39.68 × 5 =
  40. 40.38 × 50 =

Answer key

  1. 435
  2. 130
  3. 345
  4. 3150
  5. 2500
  6. 105
  7. 405
  8. 1950
  9. 2450
  10. 180
  11. 1500
  12. 1200
  13. 490
  14. 325
  15. 415
  16. 240
  17. 445
  18. 115
  19. 75
  20. 380
  21. 345
  22. 405
  23. 2700
  24. 750
  25. 295
  26. 3000
  27. 255
  28. 285
  29. 170
  30. 240
  31. 4050
  32. 4800
  33. 1650
  34. 4350
  35. 415
  36. 185
  37. 2400
  38. 3550
  39. 340
  40. 1900

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