Question

Найдите значение выражения(-1/12+2/5)+(0,36-0,64)-1 13/15 ПОМОГИТЕ ПОЖАЛУЙСТА!

Answer 1

$(-\tt\displaystyle\frac{1}{12}+\frac{2}{5})+(-0,36-0,64)-1\frac{13}{15}=-2\frac{11}{20}$

$1)-\tt\displaystyle\frac{1}{12}+\frac{2}{5}=-\frac{1*5}{12*5}+\frac{2*12}{5*12}=-\frac{5}{60}+\frac{24}{60}=\frac{19}{60}$

$2)-0,36-0,64=-1$

$3)\tt\displaystyle\frac{19}{60}+(-1)=\frac{19}{60}-1=-\frac{41}{60}$

$4)-\tt\displaystyle\frac{41}{60}-1\frac{13}{15}=-\frac{41}{60}-1\frac{13*4}{15*4}=-\frac{41}{60}-1\frac{52}{60}=-1\frac{93}{60}=-2\frac{33}{60}=-2\frac{11}{20}$