a)
simplificam prin 25
=11/4
simplificam prin 9
=13/11
[tex]2.75 - 1.(18) = {}^{11)} \frac{11}{4} - {}^{4)} \frac{13}{11} = \\ \\ = \frac{121}{44} - \frac{52}{44} = \frac{69}{44} = 1.56(81)[/tex]
b)
simplificam prin 3
=7/3
simplificam prin 4
=29/25
[tex] {}^{25)} \frac{7}{3} - {}^{3)} \frac{29}{25} = \frac{175}{75} - \frac{87}{75} = \\ \\ = \frac{88}{75} = 1.17(3)[/tex]
