1/2+1/3+1/4+1/6+1/12+1/48+1/56
1/2+1/6+1/12+1/24+1/48+1/56
1/3+1/6+1/12+1/24+1/48
(-1/12-1/36+3/4-1/6)×(-48)
(-1/12-1/36+3/4-1/6)*(-48)
计算 2/3+1/6+1/12+1/24+1/48+1/96+1/192
1/2+1/6+1/12+...+1/56=
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72
求解一道小学数学题1+2*1/6+3*1/12+4*1/20+5*1/3+6*1/42+7*1/56+8*1/72+9*
计算:1 6/1+2 12/1+3 20/1+4 30/1+5 42/1+6 56/1+7 72/1
(1/2+1/4+1/6+1/8)-(1/3+1/6+1/9+1/12)+(1/4+1/8+1/12+1/16)-(1/
(1/2+1/4+1/6+1/8)-(1/3+1/6+1/9+1/12)+(1/4+1/8+1/12+1/16)-(1/
2/1 3/1 4/1 5/1 6/1 8/1 10/1 12/1 15/1 20/1