题文
观察算式:
+
=
= 
﹣
=
=
+
=
=
﹣
=
=
+
=
=
﹣
=
=
(1)从上面的算式中你发现了 .
(2)根据你发现的规律填空:
+
+
+
+
+
= .
观察算式:
+
=
= 
﹣
=
=
+
=
=
﹣
=
=
+
=
=
﹣
=
=
(1)从上面的算式中你发现了 .
(2)根据你发现的规律填空:
+
+
+
+
+
= .
试题篮
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