题目内容

脱式计算(能简算的要简算)
44
9
×
3
8
×
6
11
3
4
+
3
4
÷
1
7
35×(
4
7
-
2
5
4
5
÷(3-
4
11
-
7
11
(0.75-
3
16
)×(
2
9
+
1
3
6
7
-
6
7
÷6.
分析:(1)运用乘法交换律解答,
(2)(3)运用乘法分配律解答,
(4)运用减法性质解答,
(5)按照先同时计算括号里面的,再算括号外面的顺序解答,
(6)按照先同时计算除法,再算减法顺序解答.
解答:解:(1)
44
9
×
3
8
×
6
11

=
44
9
×
6
11
×
3
8

=
8
3
×
3
8

=1;

(2)5×
3
4
+
3
4
÷
1
7

=
3
4
×
(5+7)
=
3
4
×
12
=9;

(3)35×(
4
7
-
2
5

=35×
4
7
-35×
2
5

=20-14
=6;

(4)
4
5
÷(3-
4
11
-
7
11

=
4
5
÷[3-(
4
11
+
7
11
)]
=
4
5
÷[3-1]
=
4
5
÷
2
=
2
5


(5)(0.75-
3
16
)×(
2
9
+
1
3

=
9
16
×
5
9

=
5
16


(6)6÷
6
7
-
6
7
÷6
=7-
1
7

=6
6
7
点评:依据四则运算计算方法正确进行计算,以及运用简便方法解决问题,是本题考查知识点.
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