怎样算简便就怎样算.(1)9×518+1318×9(2)53-59×32-16(3)18÷[125×(25+110)](4)(58+127)×8+1927.-数学

题文

怎样算简便就怎样算.
(1)9×
5
18
+
13
18
×9
(2)
5
3
-
5
9
×
3
2
-
1
6
(3)
1
8
÷[
1
25
×(
2
5
+
1
10
)]
(4)(
5
8
+
1
27
)×8+
19
27
题型:解答题  难度:中档

答案

(1)9×
5
18
+
13
18
×9,
=(
5
18
+
13
18
)×9,
=1×9,
=9;

(2)
5
3
-
5
9
×
3
2
-
1
6

=
5
3
-
5
6
-
1
6

=
5
3
-(
5
6
+
1
6
),
=
5
3