Răspuns: a) 1,39265 b) 150,5
Explicație pas cu pas:
a) [(3,4-1,3)2÷3,5+0,7•23]•0,7•0,23÷2 =
= (2,1•2÷3,5+0,7•23)•0,7•0,23÷2 =
= (4,2÷3,5+0,7•23)•0,7•0,23÷2 =
= (1,2+0,7•23)•0,7•0,23÷2 =
= (1,2+16,1)•0,7•0,23÷2 =
= 17,3•0,7•0,23÷2 =
= 12,11•0,23÷2 =
= 2,7853÷2 =
= 1,39265
b) 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
Succes! :D
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