问题 解答题
5
6
+
3
8
)×48=
12
1
4
÷25=
59
78
÷
1
77
=
8
17
÷23+
1
23
×
9
17
=
25
9
÷
5
4
÷
4
5
=
16
5
×3÷
4
5
=
5
9
-
1
2
×
1
3
)÷
5
6
=
3
4
+
5
8
)×32=
5
9
×
3
4
+
5
9
×
1
4
=
10
21
×
12
25
×
7
8
=
88×(
3
8
+
1
44
)=
5
4
×
1
8
×16=
1
5
+
2
9
×
3
10
=
44-72×
5
12
=
14
15
×14+
14
15
=
答案

(1)(

5
6
+
3
8
)×48,

=

5
6
×48+
3
8
×48,

=40+18,

=58;

(2)12

1
4
÷25,

=

49
4
×
1
25

=

49
100

(3)

59
78
÷
1
77

=

59
78
×(78-1),

=

59
78
×78-
59
78
×1,

=59-

59
78

=58

19
78

(4)

8
17
÷23+
1
23
×
9
17

=

8
17
×
1
23
+
1
23
×
9
17

=(

8
17
+
9
17
)×
1
23

=1×

1
23

=

1
23

(5)

25
9
÷
5
4
÷
4
5

=

25
9
÷(
5
4
×
4
5
),

=

25
9
÷1,

=

25
9

(6)

16
5
×3÷
4
5

=

16
5
×3×
5
4

=

16
5
×
5
4
×3,

=4×3,

=12;

(7)(

5
9
-
1
2
×
1
3
)÷
5
6

=(

5
9
-
1
6
)×
6
5

=

5
9
×
6
5
-
1
6
×
6
5

=

2
3
-
1
5

=

7
15

(8)(

3
4
+
5
8
)×32,

=

3
4
×32+
5
8
×32,

=24+20,

=44;

(9)

5
9
×
3
4
+
5
9
×
1
4

=

5
9
×(
3
4
+
1
4
),

=

5
9
×1,

=

5
9

(10)

10
21
×
12
25
×
7
8

=

8
35
×
7
8

=

1
5

(11)88×(

3
8
+
1
44
),

=88×

3
8
+88×
1
44

=33+2,

=35;

(12)

5
4
×
1
8
×16,

=

5
4
×(
1
8
×16),

=

5
4
×2,

=

5
2

(13)

1
5
+
2
9
×
3
10

=

1
5
+
1
15

=

4
15

(14)44-72×

5
12

=44-30,

=14;

(15)

14
15
×14+
14
15

=

14
15
×(14+1),

=

14
15
×15,

=14.

单项选择题 案例分析题
单项选择题