18(1)
18(1)
计算(1)18
(1)206×18+292
简便计算奥数题(1-1/18-1/19)*(1/17+1/18)+(1/18+1/19)*(1/17+1/18-1)用代
18题 (1)(2)
(1+1/16+1/17+1/18)x(1/16+1/17+1/18+1/19)-(1+1/16+1/17+1/18+1
(86+1/16*)*16/17-(37+1/17)*17/18+(58+1/18)*18/19
数字推理:1,9,18,324,( )
数量关系:1,9,18,324,)
(1/18 +1/24)×8+1/18 ×x=1
(1+18/51)+(3+18/51*2)+(5+18/51*3)+…+(97+18/51*49)+(99+18/51*
简算2/3*【(1/18-1/54)/1/54】