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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 814 · 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. 1.15 × 50 =
  2. 2.72 × 5 =
  3. 3.94 × 5 =
  4. 4.51 × 5 =
  5. 5.84 × 50 =
  6. 6.23 × 50 =
  7. 7.40 × 5 =
  8. 8.47 × 50 =
  9. 9.59 × 50 =
  10. 10.37 × 50 =
  11. 11.34 × 5 =
  12. 12.56 × 5 =
  13. 13.61 × 5 =
  14. 14.24 × 5 =
  15. 15.76 × 50 =
  16. 16.21 × 5 =
  17. 17.90 × 5 =
  18. 18.76 × 5 =
  19. 19.74 × 5 =
  20. 20.74 × 50 =
  21. 21.12 × 50 =
  22. 22.13 × 5 =
  23. 23.67 × 5 =
  24. 24.75 × 50 =
  25. 25.96 × 50 =
  26. 26.83 × 50 =
  27. 27.50 × 5 =
  28. 28.71 × 5 =
  29. 29.94 × 50 =
  30. 30.27 × 50 =
  31. 31.84 × 50 =
  32. 32.76 × 5 =
  33. 33.23 × 5 =
  34. 34.66 × 5 =
  35. 35.30 × 50 =
  36. 36.50 × 5 =
  37. 37.34 × 50 =
  38. 38.23 × 50 =
  39. 39.29 × 5 =
  40. 40.80 × 50 =

Answer key

  1. 750
  2. 360
  3. 470
  4. 255
  5. 4200
  6. 1150
  7. 200
  8. 2350
  9. 2950
  10. 1850
  11. 170
  12. 280
  13. 305
  14. 120
  15. 3800
  16. 105
  17. 450
  18. 380
  19. 370
  20. 3700
  21. 600
  22. 65
  23. 335
  24. 3750
  25. 4800
  26. 4150
  27. 250
  28. 355
  29. 4700
  30. 1350
  31. 4200
  32. 380
  33. 115
  34. 330
  35. 1500
  36. 250
  37. 1700
  38. 1150
  39. 145
  40. 4000

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