Ответ:
5/7+3/5=25/35+21/35=46/35=1 11/35
4 5/8-2 4/5=37/8-14/5=185/40-112/40=73/40=1 33/40
9 8/15-0,8+5 2/3=135/15-8/10+17/3=270/30-24/30+170/30=416/30=13 26/30=13 13/15
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Ответ:
5/7+3/5=25/35+21/35=46/35=1 11/35
4 5/8-2 4/5=37/8-14/5=185/40-112/40=73/40=1 33/40
9 8/15-0,8+5 2/3=135/15-8/10+17/3=270/30-24/30+170/30=416/30=13 26/30=13 13/15