问题 解答题
能简算的要简算
248-25
9
20
-22.05
12×(
1
4
+
1
6
-
1
3
)
6.25×6+3×6
1
4
+625%
1
4
17
×(2
2
3
-
3
4
)+17
11
12
÷
17
21
(9
8
11
-3
5
14
-1
9
14
1
4
答案

(1)248-25

9
20
-22.05,

=248-(25

9
20
+22.05),

=248-47.5,

=200.5;

(2)12×(

1
4
+
1
6
-
1
3
),

=12×

1
4
+12×
1
6
-12×
1
3

=3+2-4,

=1;

(3)6.25×6+3×6

1
4
+625%,

=6.25×(6+3+1),

=6.25×10,

=62.5;

(4)1

4
17
×(2
2
3
-
3
4
+17
11
12
÷
17
21

=1

4
17
×1
11
12
+17
11
12
÷
17
21

=1

4
17
×(1
11
12
+17
11
12
),

=1

4
17
×18
11
6

=24.5;

(5)(9

8
11
-3
5
14
-1
9
14
)×
1
4

=(9

8
11
-5)×
1
4

=4

8
11
×
1
4

=1

2
11

问答题
单项选择题 A1/A2型题