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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 287 · 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. 1.41 × 5 =
  2. 2.23 × 5 =
  3. 3.83 × 50 =
  4. 4.83 × 5 =
  5. 5.56 × 5 =
  6. 6.57 × 5 =
  7. 7.91 × 50 =
  8. 8.73 × 50 =
  9. 9.20 × 50 =
  10. 10.21 × 50 =
  11. 11.13 × 50 =
  12. 12.54 × 50 =
  13. 13.42 × 5 =
  14. 14.28 × 5 =
  15. 15.85 × 5 =
  16. 16.45 × 50 =
  17. 17.42 × 5 =
  18. 18.40 × 5 =
  19. 19.47 × 5 =
  20. 20.56 × 5 =
  21. 21.93 × 50 =
  22. 22.60 × 5 =
  23. 23.60 × 50 =
  24. 24.47 × 5 =
  25. 25.15 × 50 =
  26. 26.33 × 5 =
  27. 27.63 × 50 =
  28. 28.89 × 50 =
  29. 29.27 × 5 =
  30. 30.38 × 50 =
  31. 31.84 × 5 =
  32. 32.14 × 5 =
  33. 33.91 × 50 =
  34. 34.55 × 50 =
  35. 35.23 × 50 =
  36. 36.76 × 5 =
  37. 37.19 × 50 =
  38. 38.22 × 5 =
  39. 39.73 × 50 =
  40. 40.90 × 50 =

Answer key

  1. 205
  2. 115
  3. 4150
  4. 415
  5. 280
  6. 285
  7. 4550
  8. 3650
  9. 1000
  10. 1050
  11. 650
  12. 2700
  13. 210
  14. 140
  15. 425
  16. 2250
  17. 210
  18. 200
  19. 235
  20. 280
  21. 4650
  22. 300
  23. 3000
  24. 235
  25. 750
  26. 165
  27. 3150
  28. 4450
  29. 135
  30. 1900
  31. 420
  32. 70
  33. 4550
  34. 2750
  35. 1150
  36. 380
  37. 950
  38. 110
  39. 3650
  40. 4500

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