问题描述:
先找规律,再填一填.
(1)110+120+130+140+150=______×______
(2)220+230+240+250=______×______
(3)343+345+347+349+351=______×______
(4)115+120+125+130+135+140+145=______×______.
(1)110+120+130+140+150=______×______
(2)220+230+240+250=______×______
(3)343+345+347+349+351=______×______
(4)115+120+125+130+135+140+145=______×______.
问题解答:
我来补答展开全文阅读