简便计算过程方法如下解:103×12-36=103x12-3x12=(103-3)x12=100x12=120
103×12-36=103×12-3×12等于括号103-3=1百百×12等于,1200
103×12-36=103x12-3x12=(103-3)x12=100x12=1200
是1200不是120你少写了一个0