(-8)-(-1)
45+(-30)
-1.5-(-11.5)
-1/4-(-1/2)
15-【1-(-20-4)】
-40-28-(-19)+(-24)
22.54+(-4.4)+(-12.54)+4.4
(2/3-1/2)-(1/3-5/6)
2.4-(-3/5)+(-3.1)+4/5
(-6/13)+(-7/13)-(-2)
(3/4-(-11/6)+(-3/7)
(-8)-(-1)
45+(-30)
-1.5-(-11.5)
-1/4-(-1/2)
15-【1-(-20-4)】
-40-28-(-19)+(-24)
22.54+(-4.4)+(-12.54)+4.4
(2/3-1/2)-(1/3-5/6)
2.4-(-3/5)+(-3.1)+4/5
(-6/13)+(-7/13)-(-2)
(3/4-(-11/6)+(-3/7)