260+261+262+263+264+265+266+267+268怎样计算最简便?

问题描述:

260+261+262+263+264+265+266+267+268怎样计算最简便?

(260+268)*9/2=2376

(1)260×9 (2)1+2+3+4+5+6+7+8 (3)将1和2的结果相加即可

264*9=2376