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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 10 · 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. 1.78 × 50 =
  2. 2.33 × 5 =
  3. 3.88 × 5 =
  4. 4.94 × 50 =
  5. 5.25 × 50 =
  6. 6.90 × 5 =
  7. 7.12 × 50 =
  8. 8.20 × 50 =
  9. 9.83 × 50 =
  10. 10.97 × 5 =
  11. 11.12 × 5 =
  12. 12.52 × 5 =
  13. 13.40 × 50 =
  14. 14.59 × 5 =
  15. 15.79 × 5 =
  16. 16.70 × 5 =
  17. 17.40 × 50 =
  18. 18.28 × 5 =
  19. 19.23 × 5 =
  20. 20.52 × 50 =
  21. 21.88 × 5 =
  22. 22.51 × 5 =
  23. 23.50 × 5 =
  24. 24.91 × 5 =
  25. 25.87 × 50 =
  26. 26.27 × 5 =
  27. 27.19 × 50 =
  28. 28.25 × 5 =
  29. 29.13 × 50 =
  30. 30.13 × 5 =
  31. 31.56 × 50 =
  32. 32.75 × 5 =
  33. 33.15 × 5 =
  34. 34.47 × 5 =
  35. 35.75 × 50 =
  36. 36.13 × 50 =
  37. 37.42 × 50 =
  38. 38.31 × 5 =
  39. 39.52 × 5 =
  40. 40.55 × 50 =

Answer key

  1. 3900
  2. 165
  3. 440
  4. 4700
  5. 1250
  6. 450
  7. 600
  8. 1000
  9. 4150
  10. 485
  11. 60
  12. 260
  13. 2000
  14. 295
  15. 395
  16. 350
  17. 2000
  18. 140
  19. 115
  20. 2600
  21. 440
  22. 255
  23. 250
  24. 455
  25. 4350
  26. 135
  27. 950
  28. 125
  29. 650
  30. 65
  31. 2800
  32. 375
  33. 75
  34. 235
  35. 3750
  36. 650
  37. 2100
  38. 155
  39. 260
  40. 2750

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