问题 解答题
简便计算
(1)(
7
8
-
1
2
)×
13
5
+
13
5
×
5
8

(2)11.4×52%-1.4×0.52
(3)
16
23
×27+
16
23
×19
(4)
6
7
×6+9÷
7
6
-
6
7
答案

(1)(

7
8
-
1
2
)×
13
5
+
13
5
×
5
8

=(

7
8
-
1
2
+
5
8
)×
13
5

=1×

13
5

=

13
5

(2)11.4×52%-1.4×0.52,

=11.4×0.52-1.4×0.52,

=(11.4-1.4)×0.52,

=10×0.52,

=5.2;

(3)

16
23
×27+
16
23
×19,

=

16
23
×(27+19),

=

16
23
×46,

=32;

(4)

6
7
×6+9÷
7
6
-
6
7

=

6
7
×6+9×
6
7
-
6
7

=(6+9-1)×

6
7

=14×

6
7

=12.

单项选择题
单项选择题 A1/A2型题