问题 解答题
脱式计算
4
5
+
1
4
)÷
7
3
+
7
10
9÷[1-(
1
2
+
1
6
)]
1.02÷(5+0.4×0.25)
答案

(1)(

4
5
+
1
4
)÷
7
3
+
7
10

=

21
20
×
3
7
+
7
10

=

9
20
+
7
10

=

23
20

(2)9÷[1-(

1
2
+
1
6
)],

=9÷[1-

2
3
],

=9÷

1
3

=27;

(3)1.02÷(5+0.4×0.25),

=1.02÷(5+0.1),

=1.02÷5.1,

=0.2.

单项选择题
单项选择题