+= += ﹣=++= 1﹣﹣= +﹣=
1﹣=+=﹣=+=﹣=+=+=+=
（1）先计算下面各题，再看看有什么规律．+=﹣=+=﹣=+=﹣= （2）根据上面的规律，直接写出下面各题的得数．+=﹣=+=﹣=+=﹣=
我会算．++﹣．
计算下面各题．﹣=﹣=﹣==﹣=﹣= 1﹣= 1﹣= 1﹣=
递等式计算．﹣﹣+﹣ 1﹣﹣﹣+++﹣﹣﹣（0.5﹣）
+
= 
+
= 
﹣
=
+
+
= 1﹣
﹣
= 
+
﹣
=
=
+
﹣
=
+
﹣
=
+
=
+
=
+
=
+
=
=
﹣
=
﹣
=
+
﹣
=
+
=
﹣
+
=
﹣
=
+
+
﹣
．
﹣
=
﹣
=
﹣
=
=
﹣
=
﹣
= 1﹣
= 1﹣
= 1﹣
=
﹣
﹣
+
﹣
﹣
﹣
+
+
+
﹣
﹣
﹣（0.5﹣
）
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