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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 244 · 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. 1.98 × 5 =
  2. 2.79 × 50 =
  3. 3.84 × 5 =
  4. 4.13 × 5 =
  5. 5.13 × 5 =
  6. 6.94 × 5 =
  7. 7.55 × 50 =
  8. 8.32 × 50 =
  9. 9.14 × 5 =
  10. 10.77 × 5 =
  11. 11.93 × 5 =
  12. 12.22 × 5 =
  13. 13.48 × 5 =
  14. 14.68 × 50 =
  15. 15.84 × 50 =
  16. 16.62 × 5 =
  17. 17.43 × 5 =
  18. 18.54 × 50 =
  19. 19.60 × 50 =
  20. 20.80 × 5 =
  21. 21.93 × 5 =
  22. 22.71 × 50 =
  23. 23.66 × 5 =
  24. 24.82 × 5 =
  25. 25.86 × 5 =
  26. 26.56 × 50 =
  27. 27.34 × 5 =
  28. 28.33 × 50 =
  29. 29.28 × 5 =
  30. 30.56 × 50 =
  31. 31.60 × 5 =
  32. 32.30 × 5 =
  33. 33.34 × 50 =
  34. 34.65 × 50 =
  35. 35.59 × 50 =
  36. 36.36 × 5 =
  37. 37.85 × 50 =
  38. 38.90 × 50 =
  39. 39.63 × 50 =
  40. 40.20 × 50 =

Answer key

  1. 490
  2. 3950
  3. 420
  4. 65
  5. 65
  6. 470
  7. 2750
  8. 1600
  9. 70
  10. 385
  11. 465
  12. 110
  13. 240
  14. 3400
  15. 4200
  16. 310
  17. 215
  18. 2700
  19. 3000
  20. 400
  21. 465
  22. 3550
  23. 330
  24. 410
  25. 430
  26. 2800
  27. 170
  28. 1650
  29. 140
  30. 2800
  31. 300
  32. 150
  33. 1700
  34. 3250
  35. 2950
  36. 180
  37. 4250
  38. 4500
  39. 3150
  40. 1000

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