14,3*6,6+5,7*(-1,4)= (23,42-54)*(-4,12+4.04)= - вопрос №369664214366571423425441240459365735221 от elinanagimova 30.03.2022 08:20

Question

Математика: 14,3*6,6+5,7*(-1,4)= (23,42-54)*(-4,12+4.04)= 5/9*(-3 6/ 5/7)*3/52= (2 1/3 - 3 1/4)*(2 3/4-0.95)=

elinanagimova · Answer

1)-14,3*6,6+5,7*(-1,4)= -94,38-7,98=-102,36.2)(23,42-54)*(-4,12+4,04)=(-30,58)*(-0,08)=2,45.3)5/9*(-3ц6/7-(-3ц5/7)*3/52=5/9*(-27/7)-(-26/7)*3/52=(-15/7)-(-3/14)=-15/7+3/14=-30/7+3/14=-27/14=-1ц13/14;4)(2ц1/3-3ц1/4)*(2ц3/4-0,95)=(7/3-13/4)*(11/4-95/100)={(7*4-13*3)/(3*4)}* {(11*25-95)/100}={(28-39)/12}* {(275-95)/100}=-11/12*180/100={(-11*15)/100}=-165/100=-1ц65/100 = или=-1,65 или сокращаем =-1ц13/20;...