（1/2-1/6)×5+1/4×4/5 11/28×8/33+13/14×25/26 4（1/2-1/6)×5+1/4×4/5 11/28×8/33+13/14×25/264/7×5/8-2/21×3/41/2×1/3+1/15×（3/4-1/8)7/12-3/24×5×12/156/7+3/4×5/6×2/7能简算的要简算?

简算：1/1*2+1/2*3+1/3*4+1/4*5+1/5*6 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)===== [2^4+1/4)(4^4+1/4)(6^4+1/4)(8^4+1/4)(10^4+1/4)】/[1^4+1/4)(3^4+1/4)(5^4+1/4)(7^4+1/4)(9^4+1/4)] 1+1+2+1+2+6+4+5+8等于 2×3/1+3×4/1+4×5/1+5×6/1+.199×200/1=? 1+6+6+8+4+2+6+6+5+4+4+1+4+7+45 (-2/1)X3/4除(-5/4)X(-6/5) 1+2+3+4+5+6+78 1+2+3+4+5+6+.1000 1 2 3 4 5 6 题 1/2/3/4/5/6题 1+2-3+4-5+6= 3+2+1+4+5+6 1、2、3、4、5、6、答案 1,2,3,4,5,6, 1、2、3、4、5、6、7 1,2,3,4,5,6,7, 1,2,3,4,5,6,