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13,(6)+5,8(3)-14·[tex] \frac{7}{9} [/tex]

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Răspuns :

Renatemambouko
13,(6)=(136-13)/9=123/9=41/3
5,8(3)=(583-58)/90=525/90=35/6
13,(6)+5,8(3)-14×7/9=
=41/3+35/6-98/9=
=(41×6+35×3-98×2)/18=
=(246+105-196)/18=
=155/18=8,6(1)



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