Question

Решите по действиям 14-13,2:(3целых11/21-2целых4/15

Answer 1

$14-13,2:(3\frac{11}{21}-2\frac{4}{15})=\\ 1)\, 3\frac{11}{21}-2\frac{4}{15}=1+\frac{11}{21}-\frac{4}{15}=1+\frac{55-28}{105}=1\frac{9}{35};\\ 2)\, 13,2: 1\frac{9}{35}=\frac{132}{10}\cdot\frac{35}{44}=\frac{21}{2}=10,5;\\ 3)\, 14-10,5=3,5.$
$14-13,2:(3\frac{11}{21}-2\frac{4}{15})=3,5.$