Question

найдите значение выражения 14-13,2(3 11/21-2 4/15)=

Answer 1

$14-13,2(3ttdisplaystylefrac{11}{21}-2frac{4}{15})=3frac{1}{2}$

$1)3ttdisplaystylefrac{11}{21}-2frac{4}{15}=3frac{55}{105}-2frac{28}{105}=1frac{27}{105}=1frac{9}{35}$

$2)13,2:1ttdisplaystylefrac{9}{35}=13frac{2}{10}:1frac{9}{35}=frac{132}{10}:frac{44}{35}=frac{132}{10}*frac{35}{44}=frac{21}{2}=10frac{1}{2}$

$3)14-10ttdisplaystylefrac{1}{2}=13frac{2}{2}-10frac{1}{2}=3frac{1}{2}$