问题 解答题
怎么简便怎么算
(5.9+1.65)÷0.25
4÷(
4
7
+
4
5

0.6÷[
3
8
÷(
4
15
+
2
15
)]
7
29
×
3
8
+
6
29
×
7
12
+
3
29
×
7
9
答案

(1)(5.9+1.65)÷0.25,

=7.55÷0.25,

=30.2;

(2)4÷(

4
7
+
4
5
),

=4÷(

20
35
+
28
35
),

=4÷

48
35

=4×

35
48

=

35
12

(3)

7
29
×
3
8
+
6
29
×
7
12
+
3
29
×
7
9

=

7
29
×
3
8
+
7
29
×
6
12
+
7
29
×
3
9

=(

3
8
+
1
2
+
1
3
)×
7
29

=(

9
24
+
12
24
+
8
24
)×
7
29

=

29
24
×
7
29

=

7
24

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