题目内容

脱式计算:
(1)205×28-3930(2)
7
11
×(
2
3
+
4
7
(3)(
5
6
-
3
4
)÷(
1
4
+
1
6
(4)
3
4
×[
1
3
÷(
1
3
-
1
4
)].
(1)205×28-3930,
=5740-3930,
=1810;

(2)
7
11
×(
2
3
+
4
7
),
=
7
11
×
2
3
+
7
11
×
4
7
),
=
14
33
+
4
11

=
26
33


(3)(
5
6
-
3
4
)÷(
1
4
+
1
6
),
=
1
12
÷
5
12

=
1
5


(4)
3
4
×[
1
3
÷(
1
3
-
1
4
)],
=
3
4
×[
1
3
÷
1
12
],
=
3
4
×4,
=3.
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