\[\boxed{\text{1139.\ }\text{еуроки}\text{-}\text{ответы}\text{\ }\text{на}\text{\ }\text{пятёрку}}\]
\[\pi \approx 3,14.\]
\[\lbrack 3,14\rbrack = 3;\]
\[\left\{ 3,14 \right\} = 3,14 - 3 = 0,14.\]