Задача Задача №3645776
А
А
\(389+145+246=(389+145)+246=534+246=780\)
\(389+(145+246)=389+391=780\)\(579+132+265=579+265+132=844+132=976\)
\(389+145+246=(389+145)+246=534+246=780\)
\(389+(145+246)=389+391=780\)
\(579+132+265=579+265+132=844+132=976\)
