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Fie Z=3,(45)-5+2,(54).Atunci Z=?
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Răspuns :

Andreutsa10ask

[tex]3 \frac{45}{99} - 5 + 2 \frac{54}{99} [/tex]

[tex] \frac{3 \times 99 + 45}{99} - \frac{5 \times 99}{99} + \frac{2 \times 99 + 54}{99} [/tex]

[tex] \frac{342}{99} - \frac{495}{99} + \frac{252}{99} [/tex]

[tex] \frac{99}{99} = 1[/tex]

=》 Z=1

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