问题 解答题
下面各题,怎样算简便就怎样算
1
4
-
1
6
)×24
7
9
÷
11
5
+
2
9
×
5
11
3-
10
21
×
3
2
-
2
7
1
6
+
3
4
×
2
3
÷2.
答案

(1)(

1
4
-
1
6
)×24,

=

1
4
×24-
1
6
×24,

=6-4,

=2;

(2)

7
9
÷
11
5
+
2
9
×
5
11

=

7
9
×
5
11
+
2
9
×
5
11

=(

7
9
+
2
9
)×
5
11

=1×

5
11

=

5
11

(3)3-

10
21
×
3
2
-
2
7

=3-

5
7
-
2
7

=3-(

5
7
+
2
7
),

=3-1,

=2;

(4)

1
6
+
3
4
×
2
3
÷2,

=

1
6
+
1
2
÷2,

=

1
6
+
1
4

=

5
12

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