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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 606 · 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. 1.63 × 50 =
  2. 2.25 × 5 =
  3. 3.43 × 5 =
  4. 4.79 × 50 =
  5. 5.86 × 5 =
  6. 6.51 × 5 =
  7. 7.72 × 5 =
  8. 8.94 × 5 =
  9. 9.30 × 50 =
  10. 10.94 × 5 =
  11. 11.25 × 5 =
  12. 12.64 × 50 =
  13. 13.32 × 5 =
  14. 14.33 × 5 =
  15. 15.54 × 50 =
  16. 16.90 × 5 =
  17. 17.48 × 5 =
  18. 18.12 × 5 =
  19. 19.46 × 50 =
  20. 20.69 × 5 =
  21. 21.73 × 5 =
  22. 22.86 × 5 =
  23. 23.94 × 50 =
  24. 24.20 × 5 =
  25. 25.91 × 5 =
  26. 26.15 × 5 =
  27. 27.23 × 5 =
  28. 28.21 × 50 =
  29. 29.86 × 50 =
  30. 30.34 × 50 =
  31. 31.79 × 50 =
  32. 32.16 × 50 =
  33. 33.21 × 50 =
  34. 34.31 × 50 =
  35. 35.69 × 5 =
  36. 36.38 × 5 =
  37. 37.80 × 5 =
  38. 38.30 × 5 =
  39. 39.32 × 5 =
  40. 40.47 × 50 =

Answer key

  1. 3150
  2. 125
  3. 215
  4. 3950
  5. 430
  6. 255
  7. 360
  8. 470
  9. 1500
  10. 470
  11. 125
  12. 3200
  13. 160
  14. 165
  15. 2700
  16. 450
  17. 240
  18. 60
  19. 2300
  20. 345
  21. 365
  22. 430
  23. 4700
  24. 100
  25. 455
  26. 75
  27. 115
  28. 1050
  29. 4300
  30. 1700
  31. 3950
  32. 800
  33. 1050
  34. 1550
  35. 345
  36. 190
  37. 400
  38. 150
  39. 160
  40. 2350

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