请展开查看知识点列表
=
6.8+0.06= 5.2+0.48= 1-0.73= 8.7-7.8=
3.6+4.8= 0.78-0.28= 20.9-9.7= 4.7-0.47=
10-0.09= 3.8+0.12= + = - =
进入组卷