2/3 3/7 3/8 4/11 4/5 1/6 5/9 5/
1*2*3+2*3*4+3*4*5+4*5*6+5*6*7+6*7*8+7*8*9+8*9*10+9*10*11+10*
5/6+2/9+7/18 11/12-(3/8-1/12) 2/3-1/4-1/6 7/11-1/5+8/11-4/5
(1*2*3*4*5*6)分之(1*2*3*4*5*6+6*7*8*9*10*11)
3/4+1/4-3/4-1/4 (5/8+2/27)*8+11/27 36*(7/9+5/6)÷58 2/3*3/5-1
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
1 2 3 3 4 5,6 7 2 2 8,7 2 10,11 7 4 5 8,4 7 9 8 6 2 这五组数各代表什
4/5+[7/8-4/5] 7/10-[2/15+1/6] 1-1/3-1/7 5/6+11/14 5/6-[4/9-1
{(2+3+4)/1 -(3+4+5)/2+(4+5+6)/3-(5+6+7)/4+...+(10+11+12)/9-(
1:1-2+3-4+5-6+...-100+1012:1-3+5-7+9-11+...+2005-20073:-8分之5
1*2*3*4*5+5*6*7*8*9/5*6*7*8*9
5×6×7×8×9分之5×6×7×8×9-1×2×3×4×5
(6/5+9/11+1又5/7)/(3/11+2/5+4/7)简便计算