Question

qual e o maior: a)5/4 ou 1,2? b)7/9 ou 0,777...? c)125/ ou 15,7 d)220/9 ou 24,4

Answer 1

a)5/4
b)iguais
c)é 125 dividido por oq?
d)220/9

Answer 2

Olá!

    a)

    $1,2=\dfrac{12}{10}=\dfrac{6\cdot4}{5\cdot4}=\dfrac{24}{20} \\ \\ \dfrac{5\cdot5}{4\cdot5}=\dfrac{25}{20} \Rightarrow \\ \\ \\ \Rightarrow \dfrac{25}{20}\ \textgreater \ \dfrac{24}{20} \Rightarrow \dfrac{5}{4}\ \textgreater \ 1,2$

    b)

    $0,777...=\dfrac{7}{9} \Rightarrow \dfrac{7}{9}=0,777...$

    c) a fração deste item está incompleta.

    d) 

    $24,4=\dfrac{244}{10}=\dfrac{122}{5} \Rightarrow \dfrac{122}{5} \cdot \dfrac{9}{9}=\dfrac{1.098}{45} \\ \\ \\ \dfrac{220}{9}=\dfrac{220}{9}\cdot \dfrac{5}{5}=\dfrac{1.100}{45} \\ \\ \\ 24,4=\dfrac{1.098}{45} \ \textless \ \dfrac{1.100}{45}=\dfrac{220}{9} \Rightarrow \\ \\ \\ \Rigtharrow 24,4\ \textless \ \dfrac{220}{9}$



Bons estudos!