试题:
用递等式计算.
(1)1375+450÷18×25

(2)168.1÷(4.3×2-0.4)
(3)
3
25
÷
1
10
+
1
5
=
(4)[1-(
1
2
-
1
4
)]×
2
3

答案:

我来补答
(1)1375+450÷18×25,
=1375+25×25,
=1375+625,
=2000;

(2)168.1÷(4.3×2-0.4),
=168.1÷(8.6-0.4),
=168.1÷8.2,
=20.5;

(3)
3
25
÷
1
10
+
1
5

=
3
25
×10+
1
5

=
6
5
+
1
5

=
7
5


(4)[1-(
1
2
-
1
4
)]×
2
3

=[1-
1
2
+
1
4
2
3

=
3
4
×
2
3

=
1
2
 
 
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剩余:2000
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