A) 7/13-0,1=7/13-1/10=(70-13)/130=57/130=0,4 b) 11/6-0,8=11/6-8/10=(55-24)/30=31/30=1
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A) 7/13-0,1=7/13-1/10=(70-13)/130=57/130=0,4 b) 11/6-0,8=11/6-8/10=(55-24)/30=31/30=1