(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].
(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×+6.3÷ | ÷[(+)×]. |
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.
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