看分数画图．（一定要用铅笔画，要平均分）（1）（2）（3）．
﹣=+=﹣=﹣=+=﹣= 1﹣=﹣=﹣=+=
+++．
递等式计算+=+=﹣=﹣= 1﹣=+﹣= 1﹣+．
直接写出得数．===== 1﹣=
．
．
﹣
=
+
=
﹣
=
﹣
=
+
=
﹣
= 1﹣
=
﹣
﹣
=
+
=
+
+
+
．
+
=
+
=
﹣
﹣
=
=
+
﹣
=
+
．
=
=
=
=
= 1﹣
=
．
粤公网安备 44130202000953号