问题 解答题
用递等式计算.
235+24×12
2.6÷(0.74-0.24)×2.5
7
8
×
3
14
+
1
4
[1-(
5
6
-
1
3
)]÷
2
5
答案

235+24×12

=235+288,

=523;

2.6÷(0.74-0.24)×2.5

=2.6÷0.5×2.5,

=5.2×2.5,

=13;

7
8
×
3
14
+
1
4

=

3
16
+
1
4

=

3
16
+
4
16

=

7
16

[1-(

5
6
-
1
3
)]÷
2
5

=[1-(

5
6
-
2
6
)]÷
2
5

=[1-

1
2
5
2

=

1
2
×
5
2

=

5
4

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