①62.32÷[13-(5.8+3.4)]=62.32÷[13-9.2]=62.32÷3.8=16.4;②(13.6-5)×(13.6+5)=8.6×18.6=159.96;③(15.4÷14+1.5)×2.8=(1.1+1.5)×2.8=2.6×2.8=7.28;④1.5÷(3.8-1.8)×2.4=1.5÷2×2.4=0.75×2.4=1.8.