July 2023 1 3 Report
resuelve los ejercicios:

A) 2+ [5- (-12 + 7) ] - (-9) =?

B) 10 - [8+ (25 - 52) ] + (-6) =?

C) [2- (15 + 8 ) ] - (-4) • 3 = ?

se resuelven con la la regla de signos que es esta.

regla de signos:

{ + • + = +}
{- • - = + }
{+ • - = -}
{- • + = -}​

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