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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 487 · 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. 1.91 × 5 =
  2. 2.42 × 5 =
  3. 3.93 × 5 =
  4. 4.42 × 50 =
  5. 5.17 × 50 =
  6. 6.63 × 5 =
  7. 7.49 × 5 =
  8. 8.77 × 5 =
  9. 9.55 × 5 =
  10. 10.24 × 50 =
  11. 11.83 × 50 =
  12. 12.35 × 50 =
  13. 13.54 × 5 =
  14. 14.18 × 5 =
  15. 15.89 × 5 =
  16. 16.66 × 50 =
  17. 17.26 × 5 =
  18. 18.82 × 50 =
  19. 19.21 × 5 =
  20. 20.77 × 50 =
  21. 21.38 × 50 =
  22. 22.62 × 5 =
  23. 23.38 × 50 =
  24. 24.45 × 50 =
  25. 25.31 × 50 =
  26. 26.23 × 50 =
  27. 27.16 × 5 =
  28. 28.29 × 50 =
  29. 29.12 × 50 =
  30. 30.74 × 50 =
  31. 31.76 × 5 =
  32. 32.47 × 50 =
  33. 33.26 × 5 =
  34. 34.32 × 50 =
  35. 35.26 × 50 =
  36. 36.53 × 5 =
  37. 37.53 × 50 =
  38. 38.84 × 5 =
  39. 39.79 × 5 =
  40. 40.39 × 5 =

Answer key

  1. 455
  2. 210
  3. 465
  4. 2100
  5. 850
  6. 315
  7. 245
  8. 385
  9. 275
  10. 1200
  11. 4150
  12. 1750
  13. 270
  14. 90
  15. 445
  16. 3300
  17. 130
  18. 4100
  19. 105
  20. 3850
  21. 1900
  22. 310
  23. 1900
  24. 2250
  25. 1550
  26. 1150
  27. 80
  28. 1450
  29. 600
  30. 3700
  31. 380
  32. 2350
  33. 130
  34. 1600
  35. 1300
  36. 265
  37. 2650
  38. 420
  39. 395
  40. 195

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