(1)原式=-10;(2)原式=-1.1;(3)原式=-2 7 10 +3 3 5 = 9 10 ;(4)原式=-12-5-14+39=-31+39=8;(5)原式=-5+11+2 1 3 + 2 3 =-5+11+3=9;(6)原式=0-1+ 18 19 =- 1 19 .