问题 解答题
计算下列各题.(能简算的要简算)
7
9
-
7
9
÷7
15÷
8
9
+15×
7
8
3
22
÷[
5
4
÷(
14
3
-
1
2
)]
3-
5
18
×
27
40
-
13
16
8
15
÷[
5
32
×(
9
10
+
1
6
)]
1
26
×(7×26)
答案

①7÷

7
9
-
7
9
÷7,

=7×

9
7
-
7
9
×
1
7

=9-

1
9

=8

8
9

②15÷

8
9
+15×
7
8

=15×

9
8
+15×
7
8

=(

9
8
+
7
8
)×15,

=2×15,

=30;

3
22
÷[
5
4
÷(
14
3
-
1
2
)],

=

3
22
÷[
5
4
÷
25
6
],

=

3
22
÷
3
10

=

5
11

④3-

5
18
×
27
40
-
13
16

=3-

3
16
-
13
16

=3-(

3
16
+
13
16
),

=3-1,

=2;

8
15
÷[
5
32
×(
9
10
+
1
6
)],

=

8
15
÷[
5
32
×
32
30
],

=

8
15
×6,

=

16
5

1
26
×(7×26),

=

1
26
×26×7,

=1×7,

=7.

多项选择题
选择题