有苹果、橘子、梨三种水果，每人任意拿两个，至少有几个人，才能保证到至少有两人选的水果一样．
计算：= ；﹣= ．
直接写出结果． 1.2﹣0.8= 7.8+0.6= 5.44﹣3.6= 1﹣0.04= 5.8+3.02= 0.67﹣0.58=﹣=+=﹣=
直接写出得数．============
计算下面各题．．
．
= ；
﹣
= ．
﹣
=
+
=
﹣
=
=
=
=
=
=
=
=
=
=
=
=
=
．
．
粤公网安备 44130202000953号