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.

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