Răspuns:
Salut
[(3,4-1,3)2:3,5+0,723]•0,7-0,23:2
= (2,1:3,5+0,723)•0,7-0,115
= (5,6+0,723)•0,7-0,115
= 6,323•0,7-0,115
= 4,4261-0,115
= 4,3111
7•{8+9•[0,5+0,2•(3,5+6:4)]}
= 7•{8+9•[0,5+0,2•(3,5+1,5)]}
= 7•[8+9•(0,5+0,2•5)]
= 7•[8+9•(0,5+1)]
= 7•(8+9•1,5)
= 7•(8+13,5)
= 7•21,5
= 150,5
Sper ca te-am ajutat!!!