9又4/5×5-12×(1/4+1/6-1/2)

来源：学生作业学帮网编辑：学帮网时间：2024/06/01 06:51:39

9又4/5×5-12×(1/4+1/6-1/2)
=(9+4/5)×5-12×1/4-12×1/6+12×1/2
=9×5+4/5×5-3-2+6
=45+4+1
=50