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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 940 · 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. 1.81 × 5 =
  2. 2.18 × 50 =
  3. 3.27 × 5 =
  4. 4.72 × 50 =
  5. 5.88 × 5 =
  6. 6.78 × 5 =
  7. 7.56 × 5 =
  8. 8.94 × 50 =
  9. 9.85 × 50 =
  10. 10.67 × 50 =
  11. 11.98 × 5 =
  12. 12.84 × 5 =
  13. 13.49 × 50 =
  14. 14.76 × 5 =
  15. 15.24 × 5 =
  16. 16.15 × 50 =
  17. 17.20 × 5 =
  18. 18.84 × 5 =
  19. 19.59 × 50 =
  20. 20.57 × 50 =
  21. 21.26 × 5 =
  22. 22.33 × 5 =
  23. 23.64 × 5 =
  24. 24.41 × 5 =
  25. 25.33 × 5 =
  26. 26.12 × 50 =
  27. 27.73 × 5 =
  28. 28.83 × 5 =
  29. 29.31 × 50 =
  30. 30.34 × 5 =
  31. 31.76 × 50 =
  32. 32.75 × 5 =
  33. 33.21 × 50 =
  34. 34.60 × 5 =
  35. 35.18 × 50 =
  36. 36.43 × 50 =
  37. 37.75 × 5 =
  38. 38.48 × 5 =
  39. 39.83 × 5 =
  40. 40.16 × 50 =

Answer key

  1. 405
  2. 900
  3. 135
  4. 3600
  5. 440
  6. 390
  7. 280
  8. 4700
  9. 4250
  10. 3350
  11. 490
  12. 420
  13. 2450
  14. 380
  15. 120
  16. 750
  17. 100
  18. 420
  19. 2950
  20. 2850
  21. 130
  22. 165
  23. 320
  24. 205
  25. 165
  26. 600
  27. 365
  28. 415
  29. 1550
  30. 170
  31. 3800
  32. 375
  33. 1050
  34. 300
  35. 900
  36. 2150
  37. 375
  38. 240
  39. 415
  40. 800

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