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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 21 · 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. 1.14 × 5 =
  2. 2.26 × 5 =
  3. 3.61 × 5 =
  4. 4.86 × 50 =
  5. 5.19 × 50 =
  6. 6.83 × 50 =
  7. 7.32 × 50 =
  8. 8.44 × 5 =
  9. 9.38 × 5 =
  10. 10.49 × 5 =
  11. 11.29 × 5 =
  12. 12.67 × 50 =
  13. 13.41 × 50 =
  14. 14.52 × 5 =
  15. 15.24 × 50 =
  16. 16.62 × 50 =
  17. 17.88 × 50 =
  18. 18.30 × 50 =
  19. 19.21 × 5 =
  20. 20.39 × 50 =
  21. 21.64 × 50 =
  22. 22.38 × 50 =
  23. 23.88 × 5 =
  24. 24.40 × 50 =
  25. 25.73 × 50 =
  26. 26.28 × 50 =
  27. 27.39 × 5 =
  28. 28.72 × 5 =
  29. 29.80 × 5 =
  30. 30.12 × 50 =
  31. 31.42 × 5 =
  32. 32.31 × 50 =
  33. 33.35 × 50 =
  34. 34.79 × 50 =
  35. 35.34 × 50 =
  36. 36.31 × 50 =
  37. 37.28 × 5 =
  38. 38.97 × 50 =
  39. 39.87 × 50 =
  40. 40.77 × 5 =

Answer key

  1. 70
  2. 130
  3. 305
  4. 4300
  5. 950
  6. 4150
  7. 1600
  8. 220
  9. 190
  10. 245
  11. 145
  12. 3350
  13. 2050
  14. 260
  15. 1200
  16. 3100
  17. 4400
  18. 1500
  19. 105
  20. 1950
  21. 3200
  22. 1900
  23. 440
  24. 2000
  25. 3650
  26. 1400
  27. 195
  28. 360
  29. 400
  30. 600
  31. 210
  32. 1550
  33. 1750
  34. 3950
  35. 1700
  36. 1550
  37. 140
  38. 4850
  39. 4350
  40. 385

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