(9-0.6*3.2)/1.5
=9/1.5-0.6*3.2/1.5
=6-1.28
=4.72
20.5-(3.64+2.8)/0.4
=20.5-3.64/0.4-2.8/0.4
=20.5-9.1-7
=4.4
3.06/【1.8*(2.41-1.91)】
=3.06/【1.8*0.5】
=3.06/0.9
=3.4
(9-0.6*3.2)/1.5
=9/1.5-0.6*3.2/1.5
=6-1.28
=4.72
20.5-(3.64+2.8)/0.4
=20.5-3.64/0.4-2.8/0.4
=20.5-9.1-7
=4.4
3.06/【1.8*(2.41-1.91)】
=3.06/【1.8*0.5】
=3.06/0.9
=3.4