问题 解答题
计算下面各题,能算简算的要简算.
2
5
+80)×125
7
8
÷
15
13
+
1
8
×
13
15
3
8
×(
2
3
-
1
5
)×
3
14
答案

(1)(

2
5
+80)×125,

=

2
5
×125+80×125,

=50+10000,

=10050;

(2)

7
8
÷
15
13
+
1
8
×
13
15

=

7
8
×
13
15
+
1
8
×
13
15

=(

7
8
+
1
8
)×
13
15

=1×

13
15

=

13
15

(3)

3
8
×(
2
3
-
1
5
)×
3
14

=

3
8
×
7
15
×
3
14

=

3
8
×(
7
15
×
3
14
),

=

3
8
×
1
10

=

3
80

单项选择题 共用题干题
单项选择题 A1/A2型题