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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 99 · 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. 1.12 × 5 =
  2. 2.27 × 5 =
  3. 3.43 × 5 =
  4. 4.34 × 50 =
  5. 5.41 × 50 =
  6. 6.55 × 50 =
  7. 7.38 × 50 =
  8. 8.80 × 50 =
  9. 9.67 × 50 =
  10. 10.18 × 50 =
  11. 11.67 × 50 =
  12. 12.41 × 50 =
  13. 13.80 × 5 =
  14. 14.47 × 5 =
  15. 15.30 × 5 =
  16. 16.57 × 5 =
  17. 17.16 × 5 =
  18. 18.86 × 50 =
  19. 19.96 × 5 =
  20. 20.13 × 5 =
  21. 21.12 × 5 =
  22. 22.46 × 50 =
  23. 23.59 × 5 =
  24. 24.27 × 5 =
  25. 25.45 × 50 =
  26. 26.54 × 5 =
  27. 27.15 × 5 =
  28. 28.53 × 50 =
  29. 29.49 × 50 =
  30. 30.50 × 50 =
  31. 31.27 × 5 =
  32. 32.34 × 50 =
  33. 33.39 × 50 =
  34. 34.91 × 50 =
  35. 35.15 × 5 =
  36. 36.94 × 50 =
  37. 37.86 × 5 =
  38. 38.19 × 5 =
  39. 39.82 × 50 =
  40. 40.81 × 50 =

Answer key

  1. 60
  2. 135
  3. 215
  4. 1700
  5. 2050
  6. 2750
  7. 1900
  8. 4000
  9. 3350
  10. 900
  11. 3350
  12. 2050
  13. 400
  14. 235
  15. 150
  16. 285
  17. 80
  18. 4300
  19. 480
  20. 65
  21. 60
  22. 2300
  23. 295
  24. 135
  25. 2250
  26. 270
  27. 75
  28. 2650
  29. 2450
  30. 2500
  31. 135
  32. 1700
  33. 1950
  34. 4550
  35. 75
  36. 4700
  37. 430
  38. 95
  39. 4100
  40. 4050

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