问题 解答题
计算(能简算的要简算)
5
12
÷4+
7
12
×
1
4

3-
49
15
×
15
7
÷
14
5

(
5
24
+
7
11
)×48

27
6
÷(
18
5
×
15
34
)

[
3
5
+7÷(
11
12
-
5
8
)]×
5
24
答案

(1)

5
12
÷4+
7
12
×
1
4

=

5
12
×
1
4
+
7
12
×
1
4

=(

5
12
+
7
12
1
4

=

1
4

(2)3-

49
15
×
15
7
÷
14
5

=3-7÷

14
5

=3-

5
2

=

1
2

(3)(

5
24
+
7
11
)×48,

=

5
24
×48+
7
11
×48,

=10+30

6
11

=40

6
11

(4)

27
6
÷(
18
5
×
15
34
),

=

27
6
÷
27
17

=

17
6

(5)[

3
5
+7÷(
11
12
-
5
8
)]×
5
24

=[

3
5
+7÷
7
24
5
24

=[

3
5
+24]×
5
24

=24

3
5
×
5
24

=5

3
24

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