题目内容

用简便方法计算
3
8
×11-
3
8
×3
8
13
÷7+
1
7
×
6
13
1
3
-
1
6
+
1
4
)×12
11.58-(1.58+
5
11
(1)
3
8
×11-
3
8
×3,
=
3
8
×
(11-3),
=
3
8
×
8,
=3;

(2)
8
13
÷7+
1
7
×
6
13

=
8
13
×
1
7
+
1
7
×
6
13

=(
8
13
+
6
13
)×
1
7

=
14
13
×
1
7

=
2
13


(3)(
1
3
-
1
6
+
1
4
)×12,
=
1
3
×
12-
1
6
×
12+
1
4
×12,
=4-2+3,
=5;

(4)11.58-(1.58+
5
11
),
=11.58-1.58-
5
11

=10-
5
11

=9
6
11
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