问题
解答题
220+240+260+280+300=______×______=______
147+148+149+150+151+152+153=______×______=______.
答案
(1)220+240+260+280+300
=260×5
=1300;
(2)147+148+149+150+151+152+153
=150×7
=1050.
故答案为:260,5,1300;150,7,1050.