41+(-23)+(-31)+0
有关换算!(1)23`31’+41`56’=________`.(2)50`20’42”=______`.(3)109`
31 37 41 43 ( ) 53
(1)27+18+41= (2)19+31+8 (3)91-23-18= (4)80-15-24
(6/13+9/31-12/41)÷(2/13+3/31-4/41)
①(-23)+59+(-41)+(-59)
谁帮我做几道题?31、37、41、43()53
(31+34+37+41+43)-(25+27+29+31+33)的简便算法
(31+34+37+41+43)-(25+27+29+31+33)怎么简便计算
数字推理12,15,18,23,30,41,( )
递等式计算(能巧算的要巧算) 125*31*41-125*31*33
(1/11+1/21+1/31+1/41)*(1/21+1/31+1/41+1/51)-(1/11+1/21+1/31+
找规律填数1 121 2 61 3 41 4 31( )( )6 21