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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 670 · 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. 1.61 × 5 =
  2. 2.76 × 5 =
  3. 3.21 × 5 =
  4. 4.53 × 5 =
  5. 5.69 × 5 =
  6. 6.42 × 5 =
  7. 7.23 × 5 =
  8. 8.80 × 5 =
  9. 9.41 × 50 =
  10. 10.92 × 5 =
  11. 11.51 × 50 =
  12. 12.26 × 5 =
  13. 13.25 × 5 =
  14. 14.18 × 5 =
  15. 15.67 × 50 =
  16. 16.66 × 50 =
  17. 17.18 × 5 =
  18. 18.14 × 5 =
  19. 19.76 × 50 =
  20. 20.22 × 50 =
  21. 21.50 × 5 =
  22. 22.15 × 5 =
  23. 23.12 × 50 =
  24. 24.95 × 5 =
  25. 25.57 × 5 =
  26. 26.50 × 5 =
  27. 27.78 × 50 =
  28. 28.52 × 50 =
  29. 29.87 × 5 =
  30. 30.36 × 5 =
  31. 31.33 × 5 =
  32. 32.62 × 50 =
  33. 33.17 × 5 =
  34. 34.35 × 50 =
  35. 35.35 × 50 =
  36. 36.54 × 5 =
  37. 37.84 × 5 =
  38. 38.31 × 50 =
  39. 39.89 × 50 =
  40. 40.41 × 50 =

Answer key

  1. 305
  2. 380
  3. 105
  4. 265
  5. 345
  6. 210
  7. 115
  8. 400
  9. 2050
  10. 460
  11. 2550
  12. 130
  13. 125
  14. 90
  15. 3350
  16. 3300
  17. 90
  18. 70
  19. 3800
  20. 1100
  21. 250
  22. 75
  23. 600
  24. 475
  25. 285
  26. 250
  27. 3900
  28. 2600
  29. 435
  30. 180
  31. 165
  32. 3100
  33. 85
  34. 1750
  35. 1750
  36. 270
  37. 420
  38. 1550
  39. 4450
  40. 2050

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