用简便方法计算.(1)2.25×4.8+77.5×0.48(2

用简便方法计算.(1)2.25×4.8+77.5×0.48(2)6.68-3.25-1.75.
2025-02-22 14:47:28
推荐回答(1个)
回答1:


(1)2.25×4.8+77.5×0.48,
=2.25×4.8+7.75×4.8,
=(2.25+7.75)×4.8,
=10×4.8,
=48;

(2)6.68-3.25-1.75,
=6.68-(3.25+1.75),
=6.68-5,
=1.68.