①92.8÷8÷1.25=92.8÷（8×1.25）=92.8÷10=9.28②18.9-18.9÷1.4=18.9-18.9×57=18.9-13.5=5.4③[（8.1-5.6）×0.9-1]×0.4=[2.5×0.9-1]×0.4=[2.25-1]×0.4=1.25×0.4=0.5④8.25×4.08+0.75×4.08+4.08=（8.25+...