题目内容

用递等式计算
(1-0.05)÷1.9+0.1
4
29
×[1-(
3
4
-
3
8
)]
4
5
+
1
4
)÷
7
3
+
7
10

375+450÷18×25.
(1)(1-0.05)÷1.9+0.1,
=0.95÷1.9+0.1,
=0.5+0.1,
=0.6;

(2)
4
29
×[1-(
3
4
-
3
8
)],
=
4
29
×[1-
3
8
],
=
4
29
×
5
8

=
5
58


(3)(
4
5
+
1
4
)÷
7
3
+
7
10

=
21
20
÷
7
3
+
7
10

=
9
20
+
7
10

=
23
20


(4)375+450÷18×25,
=375+25×25,
=375+625,
=1000.
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