1()()()*()= ()()52,1-9必须出现不能重复出现

1/52+49/52×51+49×48/52×51×50+.+49×...×1/52×...×3=? 9/52-1/52-7/52 1/52+49/52×51+49×48/52×51×50+.+49×...×1/52×...×3=?1/52+49/52×51+49×48/52×51×50+.+49×...×1/52×...×=?1/52+49/52×51+49×48/52×51×50+......+49×...×1/52×...×3=? 1（x+6）=52 52+2x=3x-1 52+2X=3X-1 1+12+13+52+82=? 1/√52×√13= x2+52=（x+1）2 1公斤=1千克,52千克=52公斤,=104斤对吗 1=52=153=2154=21355=? 1=52=43=3.5=? 已知∠1=52°52′,求∠1的余角与补角. （1+1×56÷28-27）×52/3=? 1+1*2/55+96/52+66=? 1-1%x=52 方程体解答一下谢谢 1()()()*()= ()()52,1-9必须出现不能重复出现 ()×1()()()=()()52将1~9填入括号内