题目内容

脱式计算:(能简算的要简算)
6
15
×
1
7
+
8
15
÷7

9
10
÷[
1
2
×(
6
5
-
3
10
)]

8.6×2
3
4
-0.6÷
4
11
(1)
6
15
×
1
7
+
8
15
÷7

=
6
15
×
1
7
+
8
15
×
1
7

=(
6
15
+
8
15
)×
1
7

=
14
15
×
1
7

=
2
15


(2)
9
10
÷[
1
2
×(
6
5
-
3
10
)]

=
9
10
÷[
1
2
×
9
10
],
=
9
10
÷
9
20

=2;

(3)8.6×2
3
4
-0.6÷
4
11

=8.6×
11
4
-0.6×
11
4

=(8.6-0.6)×
11
4

=8×
11
4

=22.
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