Решение.

$1. \frac{(152\frac{3}{4} - 148\frac{3}{8}) \cdot 0,3}{0,2} = 6\frac{9}{16} = 6,5625.$

$1) 152\frac{3}{4} - 148\frac{3}{8} = 152\frac{6}{8} - 148\frac{3}{8} = 4\frac{3}{8};$

$2) 4\frac{3}{8} \cdot 0,3 = \frac{35}{8} \cdot \frac{3}{10} = \frac{35 \cdot 3}{8 \cdot 10} = \frac{7 \cdot 3}{8 \cdot 2} = \frac{21}{16} = 1\frac{5}{16};$

$3) 1\frac{5}{16} : 0,2 = \frac{21}{16} : \frac{2}{10} = \frac{21}{16} \cdot \frac{10}{2} = \frac{21 \cdot 10}{16 \cdot 2} = \frac{21 \cdot 5}{8 \cdot 2} = \frac{105}{16} = 6\frac{9}{16}.$

Ответ: 6,5625.