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递等式计算,能简便的用简便方法.256×1534×2213645×920×18174211×538-4211×4.3755417÷7×6×17(78+16+23)×481719+56×819.

题目详情
递等式计算,能简便的用简便方法.
2
5
6
×1
5
34
×2
2
13
6
4
5
×
9
20
×1
8
17
4
2
11
×5
3
8
-4
2
11
×4.375
5
4
17
÷7×6×17
7
8
+
1
6
+
2
3
)×48
1
7
19
+
5
6
×
8
19
▼优质解答
答案和解析
(1)2
5
6
×1
5
34
×2
2
13

=
17
6
×
39
34
×
28
13

=
13
4
×
28
13

=7;

(2)6
4
5
×
9
20
×1
8
17

=
34
5
×
9
20
×
25
17

=
34
5
×
25
17
×
9
20

=10×
9
20

=
9
2


(3)4
2
11
×5
3
8
-4
2
11
×4.375,
=4
2
11
×(5
3
8
-4
3
8
),
=4
2
11
×1,
=4
2
11


(4)5
4
17
÷7×6×17,
=
89
17
×17×6×
1
7

=89×6×