0.38+9.6÷3.2.×5.4
=0.38+3*5.4
=0.38+16.2
=16.58
26.7-0.5×0.5-0.75
=26.7-(0.25+0.75)
=26.7-1
=25.7
5.5×17.3+6.7×5.5
=5.5*(17.3+6.7)
=5.5*24
=132
168.1÷（4.3×2-0.4）
=168.1÷(8.2)
=20.5
5.1X-3.5X=0.8
1.6x=0.8
x=0.5
（X+1.25）÷1.5=4
X+1.25=4 *1.5
x=3*1.5
=4.5