问题
填空题
330+340+350+360+370=______×______=______.
答案
330+340+350+360+370,
=(350-20)+(350-10)+350+(350+10)+(350+20),
=350×5+(20+10-20-10),
=350×5,
=1750;
故答案为:350,5,1750.
330+340+350+360+370=______×______=______.
330+340+350+360+370,
=(350-20)+(350-10)+350+(350+10)+(350+20),
=350×5+(20+10-20-10),
=350×5,
=1750;
故答案为:350,5,1750.