问题 解答题
脱式计算,能简便的要简便计算.
12÷
3
4
×
4
3
8
13
÷7+
1
7
×
6
13
1
7
×34×7×
2
17
1
4
+
3
4
×
1
3
1
3
+
4
7
+
2
3
+
1
7
1
7
×4÷
1
7
×4.
答案

(1)12÷

3
4
×
4
3

=12×

4
3
×
4
3

=

64
3

=21

1
3

(2)

8
13
÷7+
1
7
×
6
13

=

8
13
×
1
7
+
1
7
×
6
13

=

1
7
×(
8
13
+
6
13
),

=

1
7
×
14
13

=

2
13

(3)

1
7
×34×7×
2
17

=(

1
7
×7)×(
2
17
×34),

=1×4,

=4;

(4)

1
4
+
3
4
×
1
3

=

1
4
+
1
4

=

1
2

(5)

1
3
+
4
7
+
2
3
+
1
7

=(

1
3
+
2
3
)+(
1
7
+
4
7
),

=1+

5
7

=1

5
7

(6)

1
7
×4÷
1
7
×4,

=

1
7
×4×7×4,

=(

1
7
×7)×(4×4),

=1×16,

=16.

单项选择题
单项选择题