6·8×2·56=2·56×[]

6·8×2·56=2·56×[] 数列2,6,15,31,56,92······中的第9个数是多少 2-4+6-8+······+2002-2004+2006= 等于几? 2+4+6+8+10+······+100=? （1+3+5++7+9······+2011）-（2+4+6+8······+2012）= 3.5--6x=2x--8.7的x的值作业急啊······················································· ·(X/4)^2+[(56-X)/4]^2=196 俗语和名句的填空1······,自知之明.2······,行必果.3工欲善其事,······.4临渊羡鱼,······.5非学无以广才,······.6······,福兮祸之所伏.7项庄舞剑,······.8······,人以群 下列算式中的被除数相同,怎么填（ ）/3=（ ）········2 （ ）/6=（ ）······2 （ ）/4=（ ）·····2 （ ）/8=（ ）···2 五年级小数简便计算35·6×0·8+3·56×12=多少 5年级下册口算训练56页答案1是2的（ ）%······ 六年级下册语文练习与测试56 57 今晚8点钱···········快··· 将下列每个3*3正方形内的九格以及横竖九格均填入一至九的数字,且不重复.· 8 9 · 2 ··1··· 1 ··· 3······· 6 7········· 8 2·········5 ···· 7 ··············· 9 8 ····7 · 急·····················1+2+3+...+999=? 五年级上册小数简便计算35·6×0·8+3·56×12 1+2+3+4+5+6+7+8+9······+99=?1 1×2＋3×4+5×6+7×8······+199×200= 计算1+(2+3)-(4+5)+(6+7)-(8+9)······-(48+49)+50=