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=26/7×(56/10-37/10)=26/7×19/10=247/35=7 2/35
2. (3 2/9 + 2 5/12)*(7 1/2+1 5/18)=(29/9+29/12)×(15/2+23/18)=
=...=49 161/324
3. (2,5- 5 2/3 : 3 7/9):(1/16)=16
Wszystkie zrobiłem tym samym sposobem co pierwszy podpunkt.