问题 解答题
脱式计算.
(1)100-91÷13
(2)(100-91)÷13(3)7.73-2.3÷0.5×0.8
(4)(1-
4
5
×
3
5
)÷
9
25
(5)
3
4
÷[(
2
3
-
1
6
)÷5].
答案

(1)100-91÷13,

=100-7,

=93;

(2)(100-91)÷13,

=9÷13,

=

9
13

(3)7.73-2.3÷0.5×0.8,

=7.73-4.6×0.8,

=7.73-3.68,

=4.05;

(4)(1-

4
5
×
3
5
)÷
9
25

=(1-

12
25
÷
9
25

=

13
25
÷
9
25

=

13
9

(5)

3
4
÷[(
2
3
-
1
6
)÷5],

=

3
4
÷[
1
2
÷5],

=

3
4
÷
1
10

=

15
2

单项选择题 A3/A4型题
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