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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 17 · 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. 1.36 × 5 =
  2. 2.55 × 5 =
  3. 3.76 × 5 =
  4. 4.57 × 50 =
  5. 5.12 × 50 =
  6. 6.49 × 5 =
  7. 7.39 × 5 =
  8. 8.79 × 50 =
  9. 9.64 × 5 =
  10. 10.37 × 5 =
  11. 11.45 × 50 =
  12. 12.83 × 5 =
  13. 13.18 × 50 =
  14. 14.91 × 50 =
  15. 15.55 × 5 =
  16. 16.41 × 5 =
  17. 17.81 × 5 =
  18. 18.74 × 5 =
  19. 19.43 × 5 =
  20. 20.71 × 5 =
  21. 21.21 × 50 =
  22. 22.65 × 5 =
  23. 23.93 × 50 =
  24. 24.64 × 5 =
  25. 25.18 × 50 =
  26. 26.27 × 5 =
  27. 27.29 × 50 =
  28. 28.36 × 5 =
  29. 29.78 × 50 =
  30. 30.20 × 5 =
  31. 31.83 × 5 =
  32. 32.85 × 50 =
  33. 33.21 × 50 =
  34. 34.51 × 50 =
  35. 35.33 × 5 =
  36. 36.38 × 50 =
  37. 37.28 × 50 =
  38. 38.74 × 50 =
  39. 39.92 × 5 =
  40. 40.52 × 5 =

Answer key

  1. 180
  2. 275
  3. 380
  4. 2850
  5. 600
  6. 245
  7. 195
  8. 3950
  9. 320
  10. 185
  11. 2250
  12. 415
  13. 900
  14. 4550
  15. 275
  16. 205
  17. 405
  18. 370
  19. 215
  20. 355
  21. 1050
  22. 325
  23. 4650
  24. 320
  25. 900
  26. 135
  27. 1450
  28. 180
  29. 3900
  30. 100
  31. 415
  32. 4250
  33. 1050
  34. 2550
  35. 165
  36. 1900
  37. 1400
  38. 3700
  39. 460
  40. 260

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