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identificati factorul comun dati factor comun si efectuati calculele:10×7supra9+10×20supra9;3supra2×8supra7-3supra2×1supra7;4supra3×10supra9-4supra3×2supra3;7supra12×23supra27+7supra12×4supra27;17supra15×2supra34+51supra5×2supra34;24supra35×18supra25+24supra35×2supra15+24supra35×11supra75;12supra49×81supra25-1supra35×12supra49+4supra25×12supra49.help pls