2. а) 3 1/3 − 1 1/4 · 16/25; б) 1 1/10 + 7 : (3 1/12 − 1 5/8).

1. \(3\frac13-1\frac14\cdot\frac{16}{25}=\frac{10}{3}-\frac54\cdot\frac{16}{25}=\frac{10}{3}-\frac45=\frac{50-12}{15}=\frac{38}{15}=2\frac8{15}\).
2. \(1\frac1{10}+7:\left(3\frac1{12}-1\frac58\right)=\frac{11}{10}+7:\left(\frac{37}{12}-\frac{13}{8}\right)=\frac{11}{10}+7:\frac{35}{24}=\frac{11}{10}+\frac{24}{5}=\frac{59}{10}=5\frac9{10}\).

Ответ: а) \(2\frac8{15}\); б) \(5\frac9{10}\).