(623x377-120)/(375x625+376)的值为( )。

Freeti2019-12-17  3

问题 (623x377-120)/(375x625+376)的值为( )。

选项 A.3 B.2 C.1.5 D.1

答案D

解析原式=[(625-2)x(375+2)-120] /(375x625+376)=(625x375+2x625-2x375-4-120)/(375x625+376)=[625x375+2x(625-375)-124] /(375x625+376)=(625x375+2x250-124)/(375x625+376)=(375x625+376)/(375x625+376)=1@##
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