Explicație pas cu pas:
1.
[tex] \frac{13}{7} = 1.(857142)[/tex]
2.
[tex]1,2(3) = \frac{123 - 12}{90} = \frac{111}{90} = \frac{37}{30} [/tex]
3.
[tex] \frac{23}{15} = 1.5(3)[/tex]
4.
[tex]m_a = \frac{2,3 + 4,75 + 9 + 0,023}{4} = \frac{16.073}{4} = 4.01825[/tex]