(1)23+(-17)+6+(-22)
(2)(-2)+3+1+(-3)+2+(-4)
(3)(-7)-9-(-3)+(-5)
(4)-4.2+5.7-8.4+10
(5)4.7-(-8.9)-7.5-(+6)
(6)2.7+(-8.5)-(+3.4)-(-1.2)
(7)-6-8-2+3.54-4.72+16.46-5.28
(8)
(9)
(10)
(11)
(12)
(13)
(14)
(15)
(19)(+1)+(-2)+(+3)+(-4)+…+(+99)+(-100)
(20)