(12 3/5-3.6*1.5)/8 怎么做

(12 3/5-3.6*1.5)/8
=(12 3/5-5 2/5)/8
=(7 1/5)/8
=36/5*1/8
=36/40
=9/10
=0.9

在括号内的先作
然后先乘除，后加减

(123/5-3.6*1.5)/8
=(24.6-5.4)/8
=19.2/8
=2.4

3
（12—-3.6 *1.5）/8
5
3 2
=（12—-5— ）/8
5 5
1
=（7—）/8
5
35+1
=—— /8
5
=7.2/8

72
=—
80
=0.9

7—
5

123/5=24.6
3.6*105=5.4
24.6-5.4=19.2
19.2/8=2.4(最终答案)