(8Ganze und drei viertel-1Ganzes drei fünftel) * 1Ganzes ein viertel - 3Ganze zwei drittel=?
(8 3/4 - 1 3/5) * (1 1/4) - (3 2/3) = (35/4 - 8/5) * 5/4 - 11/3
= (175-32)/ 20 --> gemeinsamer Nenner) * 5/4 - 11/5
= 143/20 * 5/4 - 11/3 = 143/16 (--> 715/80 durch 5) - 11/3
= (429-176) / 48 (--> gemeinsamer Nenner)
=253/48
$$\left(\left({\mathtt{8}}{\mathtt{\,\small\textbf+\,}}{\frac{{\mathtt{3}}}{{\mathtt{4}}}}\right){\mathtt{\,-\,}}\left({\mathtt{1}}{\mathtt{\,\small\textbf+\,}}{\frac{{\mathtt{3}}}{{\mathtt{5}}}}\right)\right){\mathtt{\,\times\,}}\left({\mathtt{1}}{\mathtt{\,\small\textbf+\,}}{\frac{{\mathtt{1}}}{{\mathtt{4}}}}\right){\mathtt{\,-\,}}\left({\mathtt{3}}{\mathtt{\,\small\textbf+\,}}{\frac{{\mathtt{2}}}{{\mathtt{3}}}}\right) = {\frac{{\mathtt{253}}}{{\mathtt{48}}}} = {\mathtt{5.270\: \!833\: \!333\: \!333\: \!333\: \!3}}$$
$${\frac{{\mathtt{253}}}{{\mathtt{48}}}} = {\mathtt{5}}{\mathtt{\,\small\textbf+\,}}{\frac{{\mathtt{13}}}{{\mathtt{48}}}}$$