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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×
|
|
▼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×
+6.3÷
,
=6.3×
+6.3×
,
=6.3×(
+
),
=6.3;
④
÷[(
+
)×
],
=
÷[(
+
)×
],
=
÷[
×
],
=
×
,
=1
.
=324.8-304,
=20.8;
②2.5×0.125×32,
=(2.5×4)×(0.125×8),
=10×1,
=10;
③6.3×
5 |
8 |
8 |
3 |
=6.3×
5 |
8 |
3 |
8 |
=6.3×(
5 |
8 |
3 |
8 |
=6.3;
④
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 |
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