195/9+39/10−5.22195/9−627/50+5.22÷(1993×0.41995×0.5+1.61995).

问题描述:

19
5
9
+3
9
10
−5.22
19
5
9
−6
27
50
+5.22
÷(
1993×0.4
1995×0.5
+
1.6
1995
).

19
5
9
+3
9
10
−5.22
19
5
9
−6
27
50
+5.22
÷(
1993×0.4
1995×0.5
+
1.6
1995
),
=
19
5
9
−1.32
19
5
9
−1.32
÷
1993×0.4+0.8
1995×0.5

=1÷
0.4×(1993+2)
1995×0.5

=1÷
4
5

=
5
4