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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 419 · 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. 1.79 × 50 =
  2. 2.17 × 5 =
  3. 3.58 × 50 =
  4. 4.71 × 50 =
  5. 5.88 × 5 =
  6. 6.73 × 5 =
  7. 7.81 × 50 =
  8. 8.70 × 5 =
  9. 9.63 × 50 =
  10. 10.58 × 50 =
  11. 11.31 × 50 =
  12. 12.48 × 5 =
  13. 13.25 × 50 =
  14. 14.48 × 5 =
  15. 15.64 × 5 =
  16. 16.17 × 5 =
  17. 17.24 × 50 =
  18. 18.42 × 5 =
  19. 19.48 × 5 =
  20. 20.88 × 50 =
  21. 21.39 × 50 =
  22. 22.75 × 50 =
  23. 23.26 × 50 =
  24. 24.40 × 50 =
  25. 25.14 × 5 =
  26. 26.45 × 50 =
  27. 27.27 × 50 =
  28. 28.93 × 5 =
  29. 29.97 × 50 =
  30. 30.74 × 5 =
  31. 31.68 × 5 =
  32. 32.72 × 50 =
  33. 33.98 × 5 =
  34. 34.65 × 50 =
  35. 35.90 × 5 =
  36. 36.80 × 5 =
  37. 37.25 × 50 =
  38. 38.77 × 50 =
  39. 39.73 × 50 =
  40. 40.83 × 50 =

Answer key

  1. 3950
  2. 85
  3. 2900
  4. 3550
  5. 440
  6. 365
  7. 4050
  8. 350
  9. 3150
  10. 2900
  11. 1550
  12. 240
  13. 1250
  14. 240
  15. 320
  16. 85
  17. 1200
  18. 210
  19. 240
  20. 4400
  21. 1950
  22. 3750
  23. 1300
  24. 2000
  25. 70
  26. 2250
  27. 1350
  28. 465
  29. 4850
  30. 370
  31. 340
  32. 3600
  33. 490
  34. 3250
  35. 450
  36. 400
  37. 1250
  38. 3850
  39. 3650
  40. 4150

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