计算:(1)(-7)-9-(-3)+(-5) (2)-4.2+5.7-8.4+1计算:(1)(-7)-9-(-3)+(-5) (2)-4.2+5.7-8.4+10

问题描述:

计算:(1)(-7)-9-(-3)+(-5) (2)-4.2+5.7-8.4+1
计算:(1)(-7)-9-(-3)+(-5)
(2)-4.2+5.7-8.4+10

1,-18。2,3.1

-7-9+3-5=-18
(2)=1.5+1.6=3.1

-18
2.7

-7-9+3-5=-18 3.1

1.-18 2.3.1

-7-9+3-5=-18

-18 3.1