Question

[0,2-0,4(6)]x(-5/2)-[-0,41(6)-3/4]:2,(3)=? Va rog

Answer 1

Răspuns:

Explicație pas cu pas:

[0,2-0,4(6)]·(-5/2)-[-0,41(6)-3/4]:2,(3)=

= [⁹⁾2/10 - (46-4)/90]·(-5/2) - [- (416-41)/900 -²²⁵⁾3/4] : (23-2)/9 =

= [(18-42)/90]·(-5/2) -[(-375-675)/900]· 9/21 =

= (-24/90)· (-5/2) + 1050/900 ·9/21 =

= (24·5)/(90·2) + (1050·9)/(900·21) =

= 120/180⁽⁶⁰ + 105/210⁽¹⁰⁵ =

= ²⁾2/3 + ³⁾1/2 = (4+3)/6 = 7/6

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