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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 689 · 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. 1.28 × 5 =
  2. 2.85 × 50 =
  3. 3.97 × 5 =
  4. 4.82 × 5 =
  5. 5.79 × 50 =
  6. 6.63 × 5 =
  7. 7.68 × 50 =
  8. 8.70 × 50 =
  9. 9.40 × 5 =
  10. 10.42 × 5 =
  11. 11.70 × 5 =
  12. 12.77 × 5 =
  13. 13.79 × 50 =
  14. 14.97 × 5 =
  15. 15.98 × 50 =
  16. 16.93 × 5 =
  17. 17.71 × 5 =
  18. 18.46 × 5 =
  19. 19.81 × 50 =
  20. 20.61 × 50 =
  21. 21.68 × 50 =
  22. 22.94 × 50 =
  23. 23.80 × 50 =
  24. 24.54 × 50 =
  25. 25.20 × 50 =
  26. 26.79 × 50 =
  27. 27.91 × 50 =
  28. 28.32 × 5 =
  29. 29.52 × 50 =
  30. 30.94 × 50 =
  31. 31.50 × 5 =
  32. 32.95 × 50 =
  33. 33.48 × 50 =
  34. 34.23 × 5 =
  35. 35.25 × 5 =
  36. 36.19 × 5 =
  37. 37.35 × 5 =
  38. 38.82 × 50 =
  39. 39.80 × 5 =
  40. 40.63 × 50 =

Answer key

  1. 140
  2. 4250
  3. 485
  4. 410
  5. 3950
  6. 315
  7. 3400
  8. 3500
  9. 200
  10. 210
  11. 350
  12. 385
  13. 3950
  14. 485
  15. 4900
  16. 465
  17. 355
  18. 230
  19. 4050
  20. 3050
  21. 3400
  22. 4700
  23. 4000
  24. 2700
  25. 1000
  26. 3950
  27. 4550
  28. 160
  29. 2600
  30. 4700
  31. 250
  32. 4750
  33. 2400
  34. 115
  35. 125
  36. 95
  37. 175
  38. 4100
  39. 400
  40. 3150

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