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(2010•霞浦县)怎样算简便就怎样算.20.3×16-4560÷152.5×0.125×326.3×58+6.3÷8389÷[(13+25)×811].

题目详情
(2010•霞浦县)
怎样算简便就怎样算.
20.3×16-4560÷15

2.5×0.125×32
6.3×
5
8
+6.3÷
8
3
8
9
÷[(
1
3
+
2
5
8
11
].
▼优质解答
答案和解析
①20.3×16-4560÷15,
=324.8-304,
=20.8;

②2.5×0.125×32,
=(2.5×4)×(0.125×8),
=10×1,
=10;

③6.3×
5
8
+6.3÷
8
3

=6.3×
5
8
+6.3×
3
8

=6.3×(
5
8
+
3
8
),
=6.3;

8
9
÷[(
1
3
+
2
5
)×
8
11
],
=
8
9
÷[(
5
15
+
6
15
)×
8
11
],
=
8
9
÷[
11
15
×
8
11
],
=
8
9
×
15
8

=1
2
3