解:(1)10+(-4)=10-4=6;
(2)(+9)+7=9+7=16;
(3)(-15)+(-32)=-15-32=-47;
(4)(-9)+0=-9+0=-9;
(5)100+(-199)=100-199=-99;
(6)(-0.5)+4.4=-0.5+4.4=3.9;
(7)(-1

)+(1.25)=-1.25+1.25=0;
(8)

+

=-1

-

=-1

.
分析:直接利用有理數(shù)的加減運算法則求解即可求得答案,注意先確定符號,再運算.
點評:此題考查了有理數(shù)的加減混合運算.此題比較簡單,注意掌握符號的變化是解此題的關(guān)鍵.