用递等式计算,能简便的要用简便方法计算. 17÷23×5 625÷9+625×89 5×(13-15)÷512 48

2025-04-16 11:56:46
推荐回答(1个)
回答1:

(1)

1
7
÷
2
3
×5,
=
3
14
×5,
=
15
14


(2)
6
25
÷9+
6
25
×
8
9

=
6
25
×
1
9
+
6
25
×
8
9

=
6
25
×(
1
9
+
8
9
),
=
6
25
×1,
=
6
25


(3)5×(
1
3
-
1
5
)÷
5
12

=5×
2
15
÷
5
12

=
2
3
×
12
5

=
8
5


(4)48×(
1
3
+
1
4
-
1
2
),
=48×
1
3
+48×
1
4
-48×
1
2

=16+12-24,
=28-24,
=4.