题目内容

计算下面各题,能简算的要简算.
3
8
+
5
8
×
2
5
+
3
4
26×(
5
13
-
2
15
)÷
1
30
4
9
-
5
12
+
2
3
)÷
1
36
16
19
×
5
17
+
12
19
×
16
17
+3÷19.
3
8
+
5
8
×
2
5
+
3
4

=
3
8
+
1
4
+
3
4

=
3
8
+(
1
4
+
3
4
),
=1
3
8


②26×(
5
13
-
2
15
)÷
1
30

=26×30×
5
13
-26×30×
2
15

=300-104,
=196;

③(
4
9
-
5
12
+
2
3
)÷
1
36

=(
4
9
-
5
12
+
2
3
)×36,
=
4
9
×36-
5
12
×36+
2
3
×36,
=16-15+24,
=25;

16
19
×
5
17
+
12
19
×
16
17
+3÷19,
=
80
323
+
192
323
+
3
19

=
272
323
+
3
19

=
272
323
+
51
323

=
323
323

=1.
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