11.72-7.85-1.72
=10-7.85
=2.15
13.8*7.6-7.6*8.8
=(13.8-8.8)*7.6
=5*7.6
=38
(0.19*(5.4+2.6))*12.5
=0.19*8*12.5
=0.19*100
=19