2·5×7·8+7·4×7·8+0·78的简便运算

2·5×7·8+7·4×7·8+0·78的简便运算 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 2011红领巾快乐数独答案一2·····4·9·631·4·8·8··97··3··3··2·95···95·86···15·3··7··9··47··5·7·3·182·3·4·····7二7·1·8·3·····413·6·2·6···4·8·8·5·1·2·61·····94·2·9·4·7·8· 观察下列三角形数表其中从第二行起每行的每一个数为其肩膀上两树之和则该表的最后一个数是?1 2 3 4 5 6 7 8················ 97 98 99 100 3 5 7·························· 0·7x+2·4=4·8-0·5x 1 2 3 4 ·····7 ·······10 ········?1 3 5 7 ·····?······?··········290 1 4 9 ·····?······?··········? 求（2+5+8······+2000）-（1+4+7······+1999）的值.【简算】 (2+4+6+8+······+100)—(1+3+5+7+······+99)等于几 （1+3+5++7+9······+2011）-（2+4+6+8······+2012）= 全部属于裸子植物的是 1卷柏 2侧柏 3银杏 4刺槐 5苏铁 6梧桐 7云杉 8贯从 9珙桐 A1237 B2357 C2379 D1358贯从是贯众······························· 把这些数字由基数词变成序数词1·2·3·4·5·6·7·8·9·10·11·12·20·30·40·50·60·70·80·90·21·35·78 1*2*3*4*5*6*7*8*9*10·········*50积的末尾一共有多少个0? 把1 9填入81格方框,不能重复· · 4 · · 5 · 6 ·9 · · 3 · · · 5 17 · · 6 · · · · 3· · 9 · 1 6 · 4 ·· 2 · 4 · · · 8 ·· 4 · 7 · · 5 · ·5 · · · · 7 · · 84 1 · · · 8 · · 5· 8 · 9 · · 6 · 4 带有数字的四字词语按顺序1···2···3···4···5···6···7···8···9···10···祝福语 这几道奥数题谁会,求2014在哪一行那一列 1 2 3 4 5 10 9 8 7 6 11 12 13 14 15 20 19 18 17 16 求2014哪一行那一列 1 2 3 4 5 6 7 8 9 ···· ····· ·························· 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 · 1×2+2×3+3×4+4×5+5×6+6×7+7×8+8×9··········+100×101等于多少?1×2+2×3+3×4+4×5+5×6+6×7+7×8+8×9··········+n(n+1)这个要代数式. 带数字1·2·3·4·5·6·7·8·9·10·的成语,每个数字至少三个