7.5*2.3+2.5*3.1怎么简算呀
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7.5*2.3+2.5*3.1怎么简算呀7.5*2.3+2.5*3.1怎么简算呀7.5*2.3+2.5*3.1怎么简算呀(7.5+2.5)*2.3+2.5*(3.1-2.3)=23+2=25
7.5*2.3+2.5*3.1怎么简算呀
7.5*2.3+2.5*3.1怎么简算呀
7.5*2.3+2.5*3.1怎么简算呀
(7.5+2.5)*2.3+2.5*(3.1-2.3)=23+2=25