а)(2+6)+8=16
б)10+(12-6)=16
в)(60-10)-30=20
г)8+(11-7)=12
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а)(2+6)+8=16
б)10+(12-6)=16
в)(60-10)-30=20
г)8+(11-7)=12
б) 10+(12-6)=16
в) (60-10)-30=20
г) 8+(11-7)=12