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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 627 · 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. 1.70 × 50 =
  2. 2.80 × 5 =
  3. 3.68 × 50 =
  4. 4.92 × 5 =
  5. 5.27 × 50 =
  6. 6.47 × 5 =
  7. 7.26 × 5 =
  8. 8.30 × 5 =
  9. 9.18 × 50 =
  10. 10.21 × 5 =
  11. 11.68 × 5 =
  12. 12.79 × 50 =
  13. 13.40 × 5 =
  14. 14.19 × 50 =
  15. 15.87 × 50 =
  16. 16.16 × 5 =
  17. 17.19 × 50 =
  18. 18.39 × 5 =
  19. 19.95 × 50 =
  20. 20.97 × 5 =
  21. 21.70 × 5 =
  22. 22.71 × 5 =
  23. 23.49 × 5 =
  24. 24.77 × 50 =
  25. 25.65 × 50 =
  26. 26.22 × 50 =
  27. 27.90 × 50 =
  28. 28.77 × 5 =
  29. 29.60 × 50 =
  30. 30.82 × 50 =
  31. 31.33 × 50 =
  32. 32.46 × 5 =
  33. 33.12 × 50 =
  34. 34.97 × 50 =
  35. 35.63 × 50 =
  36. 36.40 × 50 =
  37. 37.87 × 5 =
  38. 38.60 × 50 =
  39. 39.22 × 5 =
  40. 40.48 × 5 =

Answer key

  1. 3500
  2. 400
  3. 3400
  4. 460
  5. 1350
  6. 235
  7. 130
  8. 150
  9. 900
  10. 105
  11. 340
  12. 3950
  13. 200
  14. 950
  15. 4350
  16. 80
  17. 950
  18. 195
  19. 4750
  20. 485
  21. 350
  22. 355
  23. 245
  24. 3850
  25. 3250
  26. 1100
  27. 4500
  28. 385
  29. 3000
  30. 4100
  31. 1650
  32. 230
  33. 600
  34. 4850
  35. 3150
  36. 2000
  37. 435
  38. 3000
  39. 110
  40. 240

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