-2又5分之2-(-11又5之4)-4-(+6.2)+(-3.
问题描述:
-2又5分之2-(-11又5之4)-4-(+6.2)+(-3.
答
-2又5分之2-(-11又5之4)-4-(+6.2)+(-3.8)
=-2.4+11.8-4-6.2-3.8
=-(2.4+4+6.2+3.8)+11.8
=-16.4+11.8
=-4.6