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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 411 · 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. 1.47 × 50 =
  2. 2.56 × 50 =
  3. 3.77 × 5 =
  4. 4.42 × 50 =
  5. 5.95 × 50 =
  6. 6.57 × 5 =
  7. 7.55 × 50 =
  8. 8.27 × 5 =
  9. 9.43 × 5 =
  10. 10.32 × 5 =
  11. 11.93 × 50 =
  12. 12.85 × 50 =
  13. 13.77 × 5 =
  14. 14.51 × 5 =
  15. 15.89 × 5 =
  16. 16.13 × 50 =
  17. 17.89 × 5 =
  18. 18.58 × 5 =
  19. 19.37 × 5 =
  20. 20.22 × 50 =
  21. 21.56 × 5 =
  22. 22.84 × 50 =
  23. 23.72 × 5 =
  24. 24.72 × 5 =
  25. 25.72 × 5 =
  26. 26.19 × 5 =
  27. 27.75 × 5 =
  28. 28.24 × 50 =
  29. 29.24 × 5 =
  30. 30.82 × 5 =
  31. 31.38 × 50 =
  32. 32.71 × 50 =
  33. 33.19 × 50 =
  34. 34.34 × 5 =
  35. 35.38 × 50 =
  36. 36.32 × 50 =
  37. 37.77 × 50 =
  38. 38.95 × 50 =
  39. 39.82 × 50 =
  40. 40.63 × 50 =

Answer key

  1. 2350
  2. 2800
  3. 385
  4. 2100
  5. 4750
  6. 285
  7. 2750
  8. 135
  9. 215
  10. 160
  11. 4650
  12. 4250
  13. 385
  14. 255
  15. 445
  16. 650
  17. 445
  18. 290
  19. 185
  20. 1100
  21. 280
  22. 4200
  23. 360
  24. 360
  25. 360
  26. 95
  27. 375
  28. 1200
  29. 120
  30. 410
  31. 1900
  32. 3550
  33. 950
  34. 170
  35. 1900
  36. 1600
  37. 3850
  38. 4750
  39. 4100
  40. 3150

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