来自梅恪的问题
先找规律,再计算.110+120+130+140+150=______×______220+230+240+250=______×______.
先找规律,再计算.
110+120+130+140+150=______×______
220+230+240+250=______×______.
1回答
2020-07-15 20:00
先找规律,再计算.110+120+130+140+150=______×______220+230+240+250=______×______.
先找规律,再计算.
110+120+130+140+150=______×______
220+230+240+250=______×______.
110+120+130+140+150
=(110+150)×5÷2
=130×5;
220+230+240+250
=(220+250)×4÷2
=470×2.
故答案为:130,5,470,2.