36*(1/2+1/3-1/4) 0.4*(2.5/75) 2013*1/2014+1/2014简便运算

收起36*(1/2+1/3-1/4) =36×1/2+36×1/3-36×1/4=18+12-9=21;0.4*(2.5/75)=1/75;2013*1/2014+1/2014简便运算=(2013+1)/2014=2014/2014=1;happ54686541/2x-4*0.25=1.25解方程x/2=2.25;x=4.5;很高兴为您解答,skyhunter...