67.23+109.2/0.42
=67.23+260
=327.23
2.61+3 5/7+5.28+2/7
=2.61+3又5/7+2/7+5.28
=7.89+4
=11.89
9.3/0.75/0.25
=9.3/0.75/0.25
=12.4/0.25
=49.6
0.25*0.125*32
=0.25*4*0.125*8
=1*1
=1