Question

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

Answer 1

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