0,9*11/12-(4 11/15-1 7/12):8,4= -31/112
1) 4 11/15-1 7/12=3,3/20
2) 0,9*11/12= 33/40
3) 33/40-3,3/20= -2,13/40
4) -2,13/40:8,4= -31/112
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0,9*11/12-(4 11/15-1 7/12):8,4= -31/112
1) 4 11/15-1 7/12=3,3/20
2) 0,9*11/12= 33/40
3) 33/40-3,3/20= -2,13/40
4) -2,13/40:8,4= -31/112