问题 解答题
脱式计算(能简算的要简算)
2
3
×(1-
1
8
-
5
8
4
7
÷[
1
2
×(
1
7
+
3
7
)]
4
7
÷6+
3
7
×
1
6
8-
6
13
-
7
13
5
6
+
3
8
)÷(
5
6
-
3
8
5
6
+
3
4
-
1
2
)×12.
答案

(1)

2
3
×(1-
1
8
-
5
8
),

=

2
3
×[1-(
1
8
+
5
8
)],

=

2
3
×[1-
1
4
],

=

2
3
×
3
4

=

1
2

(2)

4
7
÷[
1
2
×(
1
7
+
3
7
)],

=

4
7
÷[
1
2
×
4
7
],

=

4
7
÷
2
7

=2;

(3)

4
7
÷6+
3
7
×
1
6

=

4
7
×
1
6
+
3
7
×
1
6

=(

4
7
+
3
7
)×
1
6

=1×

1
6

=

1
6

(4)8-

6
13
-
7
13

=8-(

6
13
+
7
13
),

=8-1,

=7;

(5)(

5
6
+
3
8
)÷(
5
6
-
3
8
),

=

29
24
÷
11
24

=

29
11

(6)(

5
6
+
3
4
-
1
2
)×12,

=

5
6
×12+
3
4
×12-
1
2
×12,

=10+9-6,

=19-6,

=13.

单项选择题
单项选择题 B1型题