问题 解答题
脱式计算.
7
13
×
3
4
+
3
4
×
6
13

3
7
÷
7
11
+
4
7
÷
7
11

③25%×32×0.125
④(37.5%+
5
6
-25%)×24.
答案

7
13
×
3
4
+
3
4
×
6
13

=(

7
13
+
6
13
)×
3
4

=1×

3
4

=

3
4

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

③25%×32×0.125,

=0.25×4×8×0.125,

=(0.25×4)×(8×0.125),

=1×1,

=1;

④(37.5%+

5
6
-25%)×24,

=(

3
8
+
5
6
-
1
4
)×24,

=

3
8
×24+
5
6
×24-
1
4
×24,,

=9+10-6,

=19-6,

=13.

单项选择题 B1型题
单项选择题 A1/A2型题