(1)(-8)+10+2+(-1)
=-8+10+2-1
=3
(2)25+(-12)+(-17)-(-6)
=25-12-17+6
=2
(3)(-0.8)+1.2+(-0.7)+(-2.1)
=-0.8+1.2-0.7-2.1
=-1.7
(4)5.6+(-0.9)+4.4=(-8.1)
=10+(-9)
=1
(5)5+(-6)+3+9+(-4)+(-7)
=17+(-17)
=0
(6)0+(-3.17)+(-5)+(+1.17)
=[-(3.17+50]+1.17
=-(8.17-1.17)
=-7
(8)0-(-2.17)-(+1.17)-0.17
=2.17-1.17-0.17
=0.83
给点Q币吧! (1)(-8)+10+2+(-1)
=-8+10+2-1
=3
(2)25+(-12)+(-17)-(-6)
=25-12-17+6
=2
(3)(-0.8)+1.2+(-0.7)+(-2.1)
=-0.8+1.2-0.7-2.1
=-1.7
(4)5.6+(-0.9)+4.4=(-8.1)
=10+(-9)
=1
(5)5+(-6)+3+9+(-4)+(-7)
=17+(-17)
=0
(6)0+(-3.17)+(-5)+(+1.17)
=[-(3.17+50]+1.17
=-(8.17-1.17)
=-7
(8)0-(-2.17)-(+1.17)-0.17
=2.17-1.17-0.17
=0.83
给点Q币吧!