问题
解答题
用简便方法计算.
|
答案
(1)0.9999×1.3-0.1111×2.7,
=0.1111×11.7-0.1111×2.7,
=0.1111×(11.7-2.7),
=0.1111×9,
=0.9999;
(2)0.0495×2500+495×0.24+51×4.95,
=4.95×25+4.95×24+51×4.95,
=4.95×(25+24+51),
=4.95×100,
=495.
用简便方法计算.
|
(1)0.9999×1.3-0.1111×2.7,
=0.1111×11.7-0.1111×2.7,
=0.1111×(11.7-2.7),
=0.1111×9,
=0.9999;
(2)0.0495×2500+495×0.24+51×4.95,
=4.95×25+4.95×24+51×4.95,
=4.95×(25+24+51),
=4.95×100,
=495.