Question

cuanto es -3-(-4)-(-2)+1=​

Answer 1

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$-3-(-4)-(-2)+1$

aplicamos la regla  de -  (-a)  = +a

$- (-4) = +4\\\\-3 + 4 - (-2) + 1\\\\-3 + 4 = 1\\\\1 - (-2) + 1\\\\- (-2) = +2\\\\1+ 2+ 1\\\\1+2 = 3\\\\3+ 1\\\\= 4$