(1)12.5×6.3+27×1.25+0.125÷0.01
=12.5*(6.3+2.7+1)=125
(2) [17.92-4×(0.78+o.46)]÷0.72
=(17.92-4*1.24)÷0.72
=12.96÷0.72
=18
(3) 42×4分之1+57×0.25+4分之1
=(42+57+1)*0.25
=25
(1)12.5×6.3+27×1.25+0.125÷0.01
=12.5*(6.3+2.7+1)=125
(2) [17.92-4×(0.78+o.46)]÷0.72
=(17.92-4*1.24)÷0.72
=12.96÷0.72
=18
(3) 42×4分之1+57×0.25+4分之1
=(42+57+1)*0.25
=25