解：①2.4×3÷0.18
=7.2÷0.18
=40
②(3.2+0.16)÷0.8
=3.36÷0.8
=4.2
③3.4×2.77+0.23×3.4
=3.4×(2.77+0.23)
=3.4×3
=10.2
④10.8÷(4.62-1.92)×4
=10.8÷2.7×4
=4×4
=16