Question

Calculati

1,(3):0,8 -1


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Answer 1

$1,(3):0,8-1=\frac{13-1}{9} \cdot(\frac{8}{10} )^{-1}-1=\frac{12}{9} \cdot(\frac{4}{5} )^{-1}-1=\frac{4}{3} \cdot\frac{5}{4} -1=\frac{5}{3} -1=\frac{5-3}{3} =\frac{2}{3}$

Answer 2

aici ai rezolvarea..........