49 109 43 79 19 ()求详解 A 73 B 109 C -518 D -2

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49109437919()求详解A73B109C-518D-249109437919()求详解A73B109C-518D-249109437919()求详解A73B109C-518D-2我猜是A491

49 109 43 79 19 ()求详解 A 73 B 109 C -518 D -2
49 109 43 79 19 ()求详解 A 73 B 109 C -518 D -2

49 109 43 79 19 ()求详解 A 73 B 109 C -518 D -2
我猜是A
49 109 43:109-(49+43)=17
109 43 79:43-(109-79)=13
43 79 19 :79-(43+19)=17
79 19 X :19-(79-X)=13 X=73