题目内容

用递等式计算,能简算的要简算.
①[1-(
3
4
-
2
5
)]×
25
26

②132-768÷24
③2-
6
13
÷
9
26
-
2
3

32
33
×32.
①[1-(
3
4
-
2
5
)]×
25
26

=[1-
7
20
25
26

=
13
20
×
25
26

=
5
8

②132-768÷24,
=132-32,
=100;
③2-
6
13
÷
9
26
-
2
3

=2-
6
13
×
26
9
-
2
3

=2-
4
3
-
2
3

=2-(
4
3
+
2
3
),
=2-2,
=0;
32
33
×32,
=
32
33
×(33-1),
=
32
33
×
33-
32
33

=32-
32
33

=31
1
33
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