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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 844 · 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. 1.82 × 50 =
  2. 2.45 × 50 =
  3. 3.47 × 50 =
  4. 4.47 × 5 =
  5. 5.47 × 50 =
  6. 6.49 × 5 =
  7. 7.79 × 50 =
  8. 8.71 × 50 =
  9. 9.12 × 50 =
  10. 10.85 × 50 =
  11. 11.24 × 50 =
  12. 12.43 × 5 =
  13. 13.70 × 50 =
  14. 14.94 × 50 =
  15. 15.14 × 50 =
  16. 16.83 × 50 =
  17. 17.27 × 5 =
  18. 18.76 × 5 =
  19. 19.71 × 5 =
  20. 20.65 × 50 =
  21. 21.16 × 5 =
  22. 22.73 × 5 =
  23. 23.75 × 5 =
  24. 24.31 × 50 =
  25. 25.96 × 5 =
  26. 26.88 × 5 =
  27. 27.30 × 5 =
  28. 28.65 × 50 =
  29. 29.27 × 50 =
  30. 30.43 × 50 =
  31. 31.60 × 50 =
  32. 32.85 × 50 =
  33. 33.82 × 50 =
  34. 34.40 × 50 =
  35. 35.53 × 50 =
  36. 36.32 × 5 =
  37. 37.85 × 5 =
  38. 38.20 × 50 =
  39. 39.97 × 5 =
  40. 40.28 × 5 =

Answer key

  1. 4100
  2. 2250
  3. 2350
  4. 235
  5. 2350
  6. 245
  7. 3950
  8. 3550
  9. 600
  10. 4250
  11. 1200
  12. 215
  13. 3500
  14. 4700
  15. 700
  16. 4150
  17. 135
  18. 380
  19. 355
  20. 3250
  21. 80
  22. 365
  23. 375
  24. 1550
  25. 480
  26. 440
  27. 150
  28. 3250
  29. 1350
  30. 2150
  31. 3000
  32. 4250
  33. 4100
  34. 2000
  35. 2650
  36. 160
  37. 425
  38. 1000
  39. 485
  40. 140

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