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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 650 · 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. 2.18 × 50 =
  3. 3.30 × 5 =
  4. 4.21 × 50 =
  5. 5.84 × 50 =
  6. 6.42 × 5 =
  7. 7.69 × 50 =
  8. 8.25 × 50 =
  9. 9.48 × 50 =
  10. 10.96 × 5 =
  11. 11.48 × 50 =
  12. 12.83 × 50 =
  13. 13.31 × 5 =
  14. 14.39 × 50 =
  15. 15.86 × 50 =
  16. 16.37 × 5 =
  17. 17.40 × 5 =
  18. 18.77 × 5 =
  19. 19.79 × 50 =
  20. 20.52 × 50 =
  21. 21.70 × 5 =
  22. 22.43 × 5 =
  23. 23.53 × 50 =
  24. 24.46 × 50 =
  25. 25.38 × 50 =
  26. 26.25 × 5 =
  27. 27.25 × 5 =
  28. 28.24 × 50 =
  29. 29.12 × 5 =
  30. 30.49 × 50 =
  31. 31.20 × 5 =
  32. 32.63 × 50 =
  33. 33.92 × 50 =
  34. 34.15 × 50 =
  35. 35.29 × 50 =
  36. 36.53 × 5 =
  37. 37.79 × 5 =
  38. 38.94 × 5 =
  39. 39.77 × 5 =
  40. 40.31 × 50 =

Answer key

  1. 3900
  2. 900
  3. 150
  4. 1050
  5. 4200
  6. 210
  7. 3450
  8. 1250
  9. 2400
  10. 480
  11. 2400
  12. 4150
  13. 155
  14. 1950
  15. 4300
  16. 185
  17. 200
  18. 385
  19. 3950
  20. 2600
  21. 350
  22. 215
  23. 2650
  24. 2300
  25. 1900
  26. 125
  27. 125
  28. 1200
  29. 60
  30. 2450
  31. 100
  32. 3150
  33. 4600
  34. 750
  35. 1450
  36. 265
  37. 395
  38. 470
  39. 385
  40. 1550

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