5/11*34*1/10*2/51= 8/9*[3/4-[7/16-1/4]=
5/11*34*1/10*2/51= 8/9*[3/4-[7/16-1/4]=
简便算法:1/8x73/100x25x32、5/11x34x1/10x2/51、8/9x[3/4-(7/16=1/4)]
1/3-1/2=-4/3,3/8-3/5=-9/40,4/11-4/7=-16/77,5/14-5/9=-25/126,
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19.100=?
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16=?
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17.+2004=?
1-2-3+4+5-6-7+8+9-10-11+12+13-14-15+16=
1-2+3-4+5-6+7-8+9-10+11-12+13-14+15-16=?
a[2][4]={1,2,3,4,5,6,7,8};b[4][3]={1,2,3,4,5,6,7,8,9,10,11,1
2/3-2/1=-4/3 3/8-3/5=-9/40 4/11-4/7=-16/77 5/14-5/9=-25/126
1*1*2*3*4*5*6*7*8*9*10*11*12.*20=?
如果1/3☆4=1/3×16/5×51/7×114/9,1/2☆5=1/2×9/4×33/6×81/8×161/10,