(5又九分之五-0.8+2又九分之四)×(7.6÷五分之四+2又五分之四×1.25)
=(5又九分之五+2又九分之四-0.8)×(7.6x5/4+2.8×5/4)
=(8-0.8)x5/4x(7.6+2.8)
=7.2x5/4x10.4
=9x10.4
=93.6