问题 解答题
简便计算
(1)(
1
4
-
1
6
)×24
; (2)
7
11
×
8
25
+
3
11
×
7
25
;(3)
9
13
÷3+
4
13
×
1
3
答案

(1)(

1
4
-
1
6
)×24

=

1
4
×24-
1
6
×24

=6-4

=2;

(2)

7
11
×
8
25
+
3
11
×
7
25

=

7
11
×
8
25
+
7
11
×
3
25

=

7
11
×(
8
25
+
3
25

=

7
11
×
11
25

=

7
25

(3)

9
13
÷3+
4
13
×
1
3

=

9
13
×
1
3
+
4
13
×
1
3

=(

9
13
+
4
13
)×
1
3

=1×

1
3

=

1
3

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