38*(1/85+1/47)-47*(1/38-1/85)+85*(1/38-1/47)

38*(1/85+1/47)-47*(1/38-1/85)+85*(1/38-1/47) 38*（85分之1+47分之1）-47*（38分之1--85分之1）+85*（38分之1--47分之1）简算 找规律填数1 7 12 24 31 47 50 ( )73 85 90 96 4/1+12/1+24/1+40/1+.19800/1 0,1,2,9,9.5,15,18,23,24,38,24,38,39,63,85,90这些数中 (1)1,7,12,24,31,47,50,( ),73,85,90,96 (2)3,6,21,42,84,69,291 1-47课, (1/12+3/47)x12-36/47 数列-1，85 1,5,21,85,, 八阶幻方1 2 59 60 61 62 7 89 10 54 53 52 51 15 1617 47 25 39 38 99×85+1×85简便计算