问题 解答题
计算下面各题.(能简算的要简算)
12÷
7
2
×
7
8
7
13
×
3
4
+
3
4
×
6
13
3
7
÷
7
11
+
4
7
÷
7
11
(
3
8
+
2
3
1
24
3
7
+3.6-
1
7
+6.4
11
9
×3.8-3.8×
2
9
答案

(1)12÷

7
2
×
7
8

=12×

2
7
×
7
8

=12×(

2
7
×
7
8
),

=12×

1
4

=3;

(2)

7
13
×
3
4
+
3
4
×
6
13

=(

7
13
+
6
13
)×
3
4

=1×

3
4

=

3
4

(3)

3
7
÷
7
11
+
4
7
÷
7
11

=

3
7
×
11
7
+
4
7
×
11
7

=(

3
7
+
4
7
)×
11
7

=1×

11
7

=

11
7

(4)(

3
8
+
2
3
)÷
1
24

=(

3
8
+
2
3
)×24,

=

3
8
×24+
2
3
×24,

=9+16,

=25;

(5)

3
7
+3.6-
1
7
+6.4,

=(

3
7
-
1
7
)+(3.6+6.4),

=

2
7
+10,

=10

2
7

(6)

11
9
×3.8-3.8×
2
9

=(

11
9
-
2
9
)×3.8,

=1×3.8,

=3.8.

单项选择题 A1型题
名词解释