1+1-1+1-2+3-5+5-2+6-3+9+1-2+5-8+4+9-5+2+3-4+123-25+63+25-42+42-12+59-1+1008=?

1 2 3 5 6 数独六宫格 ++++1+ 2+3+++ +++5+6 ++5+++ 6++++2 ++++1+ 巧算：(1+1/2+1/3+1/4+1/5)*(1/2+1/3+1/4+1/5+1/6)-(1+1/2+1/3+1/4+1/5+1/6)*(1/2+1/3+1/4+1/5)(1+1/2+1/3+1/4+1/5)*(1/2+1/3+1/4+1/5+1/6)-(1+1/2+1/3+1/4+1/5+1/6)*(1/2+1/3+1/4+1/5)===== 简算：1/1*2+1/2*3+1/3*4+1/4*5+1/5*6 计算(+5/2)-(-5/3)=-5/1(-5/2)-(-5/3)=5/12/1-3/1=6/1(-2/1)-3/1=-6/1 1+1+1+1+1-5+5-5+1+1-2+3+3+3+3-6-3-3等于多少? 1／6、1／3、1／2（ ）、5／6、1. 1/6,1/3,1/2,(),5/6,()探索规律, 6/1 3/1 2/1 ( ) 6/5 ( ); / 等于除号 1+1+1+1+11+-1-1-1-1-2-3-4-5-6等于 1-1/2+1/3-1/4+1/5-1/6+1/7.-1/50=? 1*1/2+1/2*1/3+1/3*1/4+1/4*1/5+1/5*1/6+1/6*1/7用简便方法怎么做? ((1/2)-1)*((1/3)-1)*((1/4)-1)*((1/5)-1)*((1/6)-1)*((1/7)-1)*((1/8)-1)*((1/9)-1)*((1/10)-1) 1+1+1+1+1+1+1+1+1+2+5+4+8+3+6+2+1+4等于多少? 1.（1+1/2+1/3+1/4）*（1/2+1/3+1/4+1/5）-（1+1/2+1/3+1/4+1/5）*（1/2+1/3+1/4）=2.（1+1/2+1/3+1/4+1/5）*（1/2+1/3+1/4+1/5+1/6）-（1+1/2+1/3+1/4+1/5+1/6）*（1/2+1/3+1/4+1/5）= (1+1/2)*(1+1/4)*(1+1/6)*.*(1+1/20)*(1-1/3)*(1-1/5)+(1-1/7)*.*(1-1/2 1-1/2+1/3-1/4+1/5-1/6+…+1/15=23*[1/( )+1/( )+1/( )+1/( )] 2×3/1+3×4/1+4×5/1+5×6/1+.199×200/1=?