23+(-73) (-84)+(-49) 7+(-2.04) 4.23+(-7.57) (-7/3)+(-7/6) 9/4+(-3/2) 3.75+(2.25)+5/4 -3.75+(+5/4)+(-1.5) （17/4)+(-10/3)+(+13/3)+(11/3) (-1.8)+(+0.2)+(-1.7)+(0.1)+(+1.8)+(+1.4) 4.6-(-3/4+1.6-4-3/4) 1/...