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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 879 · 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. 1.85 × 5 =
  2. 2.24 × 5 =
  3. 3.41 × 50 =
  4. 4.87 × 5 =
  5. 5.90 × 5 =
  6. 6.25 × 50 =
  7. 7.37 × 5 =
  8. 8.59 × 50 =
  9. 9.17 × 5 =
  10. 10.82 × 50 =
  11. 11.36 × 50 =
  12. 12.39 × 50 =
  13. 13.41 × 5 =
  14. 14.52 × 50 =
  15. 15.48 × 50 =
  16. 16.66 × 5 =
  17. 17.18 × 5 =
  18. 18.66 × 5 =
  19. 19.35 × 50 =
  20. 20.77 × 5 =
  21. 21.24 × 5 =
  22. 22.74 × 5 =
  23. 23.96 × 5 =
  24. 24.74 × 50 =
  25. 25.34 × 5 =
  26. 26.94 × 50 =
  27. 27.47 × 50 =
  28. 28.22 × 5 =
  29. 29.47 × 50 =
  30. 30.65 × 5 =
  31. 31.75 × 50 =
  32. 32.20 × 50 =
  33. 33.63 × 5 =
  34. 34.35 × 5 =
  35. 35.61 × 50 =
  36. 36.77 × 50 =
  37. 37.50 × 5 =
  38. 38.22 × 50 =
  39. 39.45 × 50 =
  40. 40.82 × 50 =

Answer key

  1. 425
  2. 120
  3. 2050
  4. 435
  5. 450
  6. 1250
  7. 185
  8. 2950
  9. 85
  10. 4100
  11. 1800
  12. 1950
  13. 205
  14. 2600
  15. 2400
  16. 330
  17. 90
  18. 330
  19. 1750
  20. 385
  21. 120
  22. 370
  23. 480
  24. 3700
  25. 170
  26. 4700
  27. 2350
  28. 110
  29. 2350
  30. 325
  31. 3750
  32. 1000
  33. 315
  34. 175
  35. 3050
  36. 3850
  37. 250
  38. 1100
  39. 2250
  40. 4100

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