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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 77 · 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. 1.44 × 5 =
  2. 2.90 × 50 =
  3. 3.29 × 5 =
  4. 4.94 × 50 =
  5. 5.65 × 5 =
  6. 6.68 × 50 =
  7. 7.73 × 5 =
  8. 8.59 × 5 =
  9. 9.92 × 5 =
  10. 10.64 × 5 =
  11. 11.83 × 5 =
  12. 12.81 × 5 =
  13. 13.72 × 5 =
  14. 14.46 × 5 =
  15. 15.24 × 50 =
  16. 16.78 × 5 =
  17. 17.91 × 5 =
  18. 18.40 × 5 =
  19. 19.38 × 50 =
  20. 20.65 × 50 =
  21. 21.35 × 5 =
  22. 22.74 × 50 =
  23. 23.93 × 5 =
  24. 24.12 × 5 =
  25. 25.14 × 5 =
  26. 26.83 × 5 =
  27. 27.69 × 50 =
  28. 28.67 × 50 =
  29. 29.44 × 5 =
  30. 30.37 × 5 =
  31. 31.50 × 50 =
  32. 32.45 × 5 =
  33. 33.34 × 5 =
  34. 34.25 × 5 =
  35. 35.64 × 5 =
  36. 36.30 × 5 =
  37. 37.29 × 5 =
  38. 38.48 × 5 =
  39. 39.47 × 50 =
  40. 40.48 × 5 =

Answer key

  1. 220
  2. 4500
  3. 145
  4. 4700
  5. 325
  6. 3400
  7. 365
  8. 295
  9. 460
  10. 320
  11. 415
  12. 405
  13. 360
  14. 230
  15. 1200
  16. 390
  17. 455
  18. 200
  19. 1900
  20. 3250
  21. 175
  22. 3700
  23. 465
  24. 60
  25. 70
  26. 415
  27. 3450
  28. 3350
  29. 220
  30. 185
  31. 2500
  32. 225
  33. 170
  34. 125
  35. 320
  36. 150
  37. 145
  38. 240
  39. 2350
  40. 240

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