题目内容

计算下面各题,能简算的要简算.
8
7
-(
1
7
+
1
10
1
3
×
2
5
×
3
10
4
7
÷6+
3
7
×
1
6
[1÷(
7
9
-
2
9
)]×
5
27
(1)
8
7
-(
1
7
+
1
10
),
=
8
7
-
1
7
-
1
10

=1-
1
10

=
9
10


(2)5×
1
3
×
2
5
×
3
10

=(5×
2
5
)×(
3
10
×
1
3
),
=2×
1
10

=
1
5


(3)
4
7
÷6+
3
7
×
1
6

=
4
7
×
1
6
+
3
7
×
1
6

=(
4
7
+
3
7
)×
1
6

=1×
1
6

=
1
6


(4)[1÷(
7
9
-
2
9
)]×
5
27

=(1÷
5
9
)×
5
27

=
9
5
×
5
27

=
1
3
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