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．
