0·8×（3·2-2·99÷2·3）简算

0·8×（3·2-2·99÷2·3）简算 8+11+14+17+20+·······+305 数学计算题.呜呜呜1+2+3+4+···················+98+99+100+99+98+···············+3+2+1 计算：(2+4+6+8+···+100)-(1+3+5+···+99) 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·························· (2+4+6+8+······+100)—(1+3+5+7+······+99)等于几 1+（-2）+3+（-4）···········+99-100等于多少 1+2+3+4·······+98+99等于多少 （1+3+5++7+9······+2011）-（2+4+6+8······+2012）= +2×2!+3×3!+·······+8×8!怎么计算? 急·····················1+2+3+...+999=? 秦始皇和汉武帝各自的功劳是?（用1·······2·······3··········来说） （x-0·1）÷0·3-(x+0·2)÷0·5=3 求（2+5+8······+2000）-（1+4+7······+1999）的值.【简算】 数学题1*2分之一+2*3分之一+3*4分之一+···············+99*100分之一=（ ） 1 2 3 4 ·····7 ·······10 ········?1 3 5 7 ·····?······?··········290 1 4 9 ·····?······?··········? 2分之1÷2分之3÷3分之4÷4分之5······2013分之2012简算 计算：（-1）+(+2)+(-3)+(-4)+.+(-99)+(+100)+.+(-2009)+(+2010)快点··········很急 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