Question

a) [(3,4 – 1,3)2 : 3,5 + 0,7 ∙ 23 ] ∙ 0,7 ∙ 0,23 : 2; b) 7 ∙ {8 + 9 ∙ [0,5 + 0,2 ∙ (3,5 + 6 : 4)]}.

Answer 1

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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