问题 解答题
6.5-(1.6÷5-0.3)
7.2-2.7÷15-0.82
3
8
×31-1÷
3
8

9
10
÷[
1
2
×(
6
5
-
3
10
)]
答案

(1)6.5-(1.6÷5-0.3),

=6.5-(0.32-0.3),

=6.5-0.02,

=6.48;

(2)7.2-2.7÷15-0.82,

=7.2-0.18-0.82,

=7.2-(0.18+0.82),

=7.2-1,

=6.2;

(3)

3
8
×31-1÷
3
8

=

93
8
-
8
3

=

215
24

(4)

9
10
÷[
1
2
×(
6
5
-
3
10
)],

=

9
10
÷[
1
2
×
9
10
],

=

9
10
÷
9
20

=2.

判断题
填空题