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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 915 · 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. 1.42 × 50 =
  2. 2.52 × 50 =
  3. 3.35 × 5 =
  4. 4.36 × 50 =
  5. 5.78 × 5 =
  6. 6.34 × 5 =
  7. 7.27 × 5 =
  8. 8.88 × 5 =
  9. 9.16 × 50 =
  10. 10.54 × 5 =
  11. 11.21 × 50 =
  12. 12.52 × 50 =
  13. 13.55 × 50 =
  14. 14.97 × 50 =
  15. 15.45 × 5 =
  16. 16.81 × 50 =
  17. 17.77 × 50 =
  18. 18.14 × 50 =
  19. 19.92 × 50 =
  20. 20.27 × 50 =
  21. 21.63 × 50 =
  22. 22.33 × 5 =
  23. 23.88 × 50 =
  24. 24.34 × 5 =
  25. 25.89 × 5 =
  26. 26.58 × 5 =
  27. 27.47 × 5 =
  28. 28.54 × 5 =
  29. 29.17 × 50 =
  30. 30.28 × 50 =
  31. 31.85 × 50 =
  32. 32.16 × 5 =
  33. 33.43 × 5 =
  34. 34.37 × 5 =
  35. 35.47 × 5 =
  36. 36.75 × 5 =
  37. 37.17 × 50 =
  38. 38.59 × 50 =
  39. 39.96 × 5 =
  40. 40.64 × 50 =

Answer key

  1. 2100
  2. 2600
  3. 175
  4. 1800
  5. 390
  6. 170
  7. 135
  8. 440
  9. 800
  10. 270
  11. 1050
  12. 2600
  13. 2750
  14. 4850
  15. 225
  16. 4050
  17. 3850
  18. 700
  19. 4600
  20. 1350
  21. 3150
  22. 165
  23. 4400
  24. 170
  25. 445
  26. 290
  27. 235
  28. 270
  29. 850
  30. 1400
  31. 4250
  32. 80
  33. 215
  34. 185
  35. 235
  36. 375
  37. 850
  38. 2950
  39. 480
  40. 3200

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