1/4*39+3/4*25+26/4*3/13怎么简便计算

问题描述:

1/4*39+3/4*25+26/4*3/13怎么简便计算

大神在此.
=1/4×(40-1)+3/4×(24+1)+26/4*3/13
=10-1/4+18+3/4+6/4
=28+2
=30
望采纳,!(^-^)