题目内容

用你喜欢的方法计算.
3
4
×
5
4
÷
15
4

5
6
+
11
12
)÷
11
12

5
8
-
1
3
×
9
8

5
7
×21+
2
7
÷
1
21
(1)
3
4
×
5
4
÷
15
4

=
3
4
×
5
4
×
4
15

=
1
4


(2)(
5
6
+
11
12
)÷
11
12

=(
5
6
+
11
12
)×
12
11

=
5
6
×
12
11
+
11
12
×
12
11

=
10
11
+1,
=1
10
11


(3)
5
8
-
1
3
×
9
8

=
5
8
-
3
8

=
1
4


(4)
5
7
×21+
2
7
÷
1
21

=(
5
7
+
2
7
)×21,
=1×21,
=21.
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