问题 填空题

1.23452+0.76552+2.469×0.7655=______.

答案

令x=1.2345,y=0.7655,

则2xy=2.469×0.7655,

1.23452+0.76552+2.469×0.7655,

=(x+y)2

=(1.2345+0.7655)2

=22

=4.

故答案为:4

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