Lapizeroid Lapizeroid Matemáticas contestada 1. (21-54)+(7-72) = 2 (24-89+18)+(-91+24) = 3 -(-417-78)+)-518-287) =4 14+[23-(34-57)] = 5 48+[15-(43-38)-27] =6 {-[-(456+ 203)] +[!96+(-401)]}+{(275)+(841)+(-650)}+220