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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 397 · 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. 1.22 × 50 =
  2. 2.94 × 50 =
  3. 3.46 × 50 =
  4. 4.82 × 5 =
  5. 5.46 × 50 =
  6. 6.70 × 50 =
  7. 7.81 × 5 =
  8. 8.40 × 5 =
  9. 9.73 × 5 =
  10. 10.22 × 50 =
  11. 11.15 × 5 =
  12. 12.14 × 5 =
  13. 13.98 × 5 =
  14. 14.27 × 5 =
  15. 15.26 × 50 =
  16. 16.50 × 50 =
  17. 17.51 × 5 =
  18. 18.80 × 50 =
  19. 19.63 × 5 =
  20. 20.18 × 5 =
  21. 21.38 × 50 =
  22. 22.65 × 50 =
  23. 23.81 × 50 =
  24. 24.33 × 5 =
  25. 25.35 × 5 =
  26. 26.40 × 5 =
  27. 27.22 × 50 =
  28. 28.63 × 5 =
  29. 29.18 × 5 =
  30. 30.29 × 5 =
  31. 31.61 × 5 =
  32. 32.77 × 5 =
  33. 33.44 × 50 =
  34. 34.14 × 50 =
  35. 35.66 × 50 =
  36. 36.81 × 5 =
  37. 37.76 × 50 =
  38. 38.37 × 50 =
  39. 39.82 × 5 =
  40. 40.73 × 5 =

Answer key

  1. 1100
  2. 4700
  3. 2300
  4. 410
  5. 2300
  6. 3500
  7. 405
  8. 200
  9. 365
  10. 1100
  11. 75
  12. 70
  13. 490
  14. 135
  15. 1300
  16. 2500
  17. 255
  18. 4000
  19. 315
  20. 90
  21. 1900
  22. 3250
  23. 4050
  24. 165
  25. 175
  26. 200
  27. 1100
  28. 315
  29. 90
  30. 145
  31. 305
  32. 385
  33. 2200
  34. 700
  35. 3300
  36. 405
  37. 3800
  38. 1850
  39. 410
  40. 365

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