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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 616 · 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. 1.58 × 50 =
  2. 2.21 × 50 =
  3. 3.45 × 5 =
  4. 4.34 × 50 =
  5. 5.71 × 5 =
  6. 6.42 × 50 =
  7. 7.83 × 5 =
  8. 8.85 × 5 =
  9. 9.23 × 5 =
  10. 10.12 × 50 =
  11. 11.17 × 50 =
  12. 12.34 × 50 =
  13. 13.82 × 50 =
  14. 14.63 × 5 =
  15. 15.23 × 5 =
  16. 16.67 × 5 =
  17. 17.96 × 50 =
  18. 18.18 × 50 =
  19. 19.54 × 5 =
  20. 20.69 × 50 =
  21. 21.90 × 5 =
  22. 22.30 × 50 =
  23. 23.73 × 50 =
  24. 24.19 × 5 =
  25. 25.80 × 50 =
  26. 26.21 × 50 =
  27. 27.39 × 5 =
  28. 28.13 × 5 =
  29. 29.65 × 50 =
  30. 30.14 × 5 =
  31. 31.70 × 5 =
  32. 32.24 × 5 =
  33. 33.43 × 5 =
  34. 34.39 × 5 =
  35. 35.90 × 5 =
  36. 36.92 × 50 =
  37. 37.13 × 50 =
  38. 38.74 × 50 =
  39. 39.28 × 50 =
  40. 40.97 × 5 =

Answer key

  1. 2900
  2. 1050
  3. 225
  4. 1700
  5. 355
  6. 2100
  7. 415
  8. 425
  9. 115
  10. 600
  11. 850
  12. 1700
  13. 4100
  14. 315
  15. 115
  16. 335
  17. 4800
  18. 900
  19. 270
  20. 3450
  21. 450
  22. 1500
  23. 3650
  24. 95
  25. 4000
  26. 1050
  27. 195
  28. 65
  29. 3250
  30. 70
  31. 350
  32. 120
  33. 215
  34. 195
  35. 450
  36. 4600
  37. 650
  38. 3700
  39. 1400
  40. 485

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