计算题:(1)(-12)+(+12)-(-6)(2)【(-5)-(+9)】-(-4)(3)8
计算题:
(1)(-12)+(+12)-(-6)
(2)【(-5)-(+9)】-(-4)
(3)8-(9-10)
(4)(3-4)-(6-10)
只要算式,