问题 解答题
简算下面各题:
(1)
5
9
×199-
5
9

(2)24×(
答案

(1)

5
9
×199-
5
9

=

5
9
×(199-1),

=

5
9
×198,

=110;

(2)24×(

=24×

3
4
+24×
5
6
-24×
1
32

=18+20-

3
4

=38-

3
4

=37

1
4

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