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

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

-7-9+3-5=-18