Question

(9 3/20 - 1,24):2 1/3-(3/4+2 5/8):(-0,625)

Answer 1

$left(9frac3{20}-1,24right):2frac13-left(frac34+2frac58right):(-0,625)\1);9frac3{20}-1,24right=9frac{3cdot5}{20cdot5}-1,24=9frac{15}{100}-1,24=9,15-1,24=7,91=\2);7,91:2frac13=7frac{91}{100}:frac73=frac{791}{100}cdotfrac37=frac{113}{100}cdot3=frac{339}{100}=3,39\3);frac34+2frac58=frac{3cdot2}{4cdot2}+frac{21}8=frac68+frac{21}8=frac{27}8\4);frac{27}8:(-0,625)=-frac{27}8:frac{625}{1000}=-frac{27}8cdotfrac{1000}{625}=-27cdotfrac{125}{625}=-frac{27}5=-5,4$
$5);3,39-(-5,4)=3,39+5,4=8,79$