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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 510 · 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. 1.28 × 5 =
  2. 2.14 × 50 =
  3. 3.13 × 50 =
  4. 4.82 × 5 =
  5. 5.54 × 5 =
  6. 6.21 × 5 =
  7. 7.15 × 50 =
  8. 8.38 × 50 =
  9. 9.35 × 50 =
  10. 10.51 × 5 =
  11. 11.90 × 50 =
  12. 12.83 × 50 =
  13. 13.44 × 5 =
  14. 14.33 × 50 =
  15. 15.16 × 5 =
  16. 16.60 × 5 =
  17. 17.77 × 5 =
  18. 18.14 × 5 =
  19. 19.41 × 5 =
  20. 20.60 × 50 =
  21. 21.25 × 5 =
  22. 22.21 × 50 =
  23. 23.77 × 5 =
  24. 24.42 × 50 =
  25. 25.38 × 5 =
  26. 26.61 × 5 =
  27. 27.30 × 50 =
  28. 28.93 × 5 =
  29. 29.92 × 5 =
  30. 30.19 × 5 =
  31. 31.19 × 5 =
  32. 32.79 × 50 =
  33. 33.31 × 50 =
  34. 34.79 × 50 =
  35. 35.52 × 5 =
  36. 36.16 × 5 =
  37. 37.19 × 5 =
  38. 38.39 × 5 =
  39. 39.12 × 50 =
  40. 40.18 × 50 =

Answer key

  1. 140
  2. 700
  3. 650
  4. 410
  5. 270
  6. 105
  7. 750
  8. 1900
  9. 1750
  10. 255
  11. 4500
  12. 4150
  13. 220
  14. 1650
  15. 80
  16. 300
  17. 385
  18. 70
  19. 205
  20. 3000
  21. 125
  22. 1050
  23. 385
  24. 2100
  25. 190
  26. 305
  27. 1500
  28. 465
  29. 460
  30. 95
  31. 95
  32. 3950
  33. 1550
  34. 3950
  35. 260
  36. 80
  37. 95
  38. 195
  39. 600
  40. 900

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