摘要：图1是由若干个小圆圈堆成的一个形如正三角形的图案.最上面一层有一个圆圈.以下各层均比上一层多一个圆圈.一共堆了层．将图1倒置后与原图1拼成图2的形状.这样我们可以算出图1中所有圆圈的个数为． 图1 图2 图3 图4 如果图1中的圆圈共有12层.(1)我们自上往下.在每个圆圈中都按图3的方式填上一串连续的正整数.则最底层最左边这个圆圈中的数是 ,(2)我们自上往下.在每个圆圈中都按图4的方式填上一串连续的整数....求图4中所有圆圈中各数的绝对值之和． 解:(1)67．·············································································································· 2分 (2)图4中所有圆圈中共有个数. 其中23个负数.1个0.54个正数.············································································· 4分 图4中所有圆圈中各数的绝对值之和 ．······························· 6分

网址：http://m.1010jiajiao.com/timu3_id_460619[举报]