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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 216 · 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. 1.81 × 5 =
  2. 2.39 × 5 =
  3. 3.61 × 5 =
  4. 4.33 × 5 =
  5. 5.48 × 50 =
  6. 6.45 × 50 =
  7. 7.13 × 5 =
  8. 8.68 × 5 =
  9. 9.44 × 5 =
  10. 10.87 × 5 =
  11. 11.98 × 5 =
  12. 12.97 × 50 =
  13. 13.93 × 5 =
  14. 14.80 × 5 =
  15. 15.42 × 5 =
  16. 16.36 × 50 =
  17. 17.83 × 50 =
  18. 18.61 × 5 =
  19. 19.27 × 50 =
  20. 20.12 × 5 =
  21. 21.94 × 5 =
  22. 22.22 × 5 =
  23. 23.73 × 50 =
  24. 24.30 × 50 =
  25. 25.35 × 50 =
  26. 26.56 × 50 =
  27. 27.65 × 5 =
  28. 28.51 × 50 =
  29. 29.34 × 50 =
  30. 30.77 × 50 =
  31. 31.35 × 5 =
  32. 32.20 × 5 =
  33. 33.85 × 50 =
  34. 34.68 × 50 =
  35. 35.72 × 50 =
  36. 36.89 × 50 =
  37. 37.68 × 50 =
  38. 38.41 × 50 =
  39. 39.83 × 50 =
  40. 40.69 × 50 =

Answer key

  1. 405
  2. 195
  3. 305
  4. 165
  5. 2400
  6. 2250
  7. 65
  8. 340
  9. 220
  10. 435
  11. 490
  12. 4850
  13. 465
  14. 400
  15. 210
  16. 1800
  17. 4150
  18. 305
  19. 1350
  20. 60
  21. 470
  22. 110
  23. 3650
  24. 1500
  25. 1750
  26. 2800
  27. 325
  28. 2550
  29. 1700
  30. 3850
  31. 175
  32. 100
  33. 4250
  34. 3400
  35. 3600
  36. 4450
  37. 3400
  38. 2050
  39. 4150
  40. 3450

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