Вычислите: 1,31+112\frac {1,3}{1+\frac 1{12}}1+1211,3▸Ответ1,2▸Решение1,31+112=13101312=1310:1312=\frac {1,3}{1+\frac 1{12}}=\frac{\frac{13}{10}}{\frac {13}{12}}=\frac{13}{10}: \frac {13}{12}=1+1211,3=12131013=1013:1213=1310⋅1213=1210=1,2\frac{13}{10}\cdot \frac{12}{13}=\frac{12}{10}=1,21013⋅1312=1012=1,2