解:
(九又七分之二+七又九分之二)/(七分之五+九分之五)=(9+2/7+7+2/9)/(5/7+5/9)
=(16+2/7+2/9)/(5/7+5/9)=(49*1/7+(49+32)*1/9+2*1/7+2*1/9)/(5*1/7+5*1/9)=(51*(1/7+1/9)+32/9)/(5*(1/7+1/9)=51/5+(32/9)/(5/7+5/9)=51/5+14/5=65/5=13
亲,请您采纳,您的采纳是我的动力,谢谢。
五又九分之四+二又九分之七(计算)
=(5+2)+(4/9+7/9)
=7+1又2/9
=8又2/9
十又六分之1-3又六分之五(计算)
=(10-3)-(5/6-1/6)
=7-2/3
=6又1/3
一又十二分之七+3又十八分之十三(计算)
=1又21/36+3又26/36
=5又11/36
八又十五分之二-七又二十五分之九(计算)
=8又10/75-7又27/75
=58/75
8 2/9,6 1/3,5 11/36,58/75