问题 填空题

计算:2009×0.23+34×20.09+4.3×200.9=______.

答案

2009×0.23+34×20.09+4.3×200.9,

=2009×0.23+0.34×2009+0.43×2009,

=2009×(0.23+0.34+0.43),

=2009×1,

=2009;

故答案为:2009.

判断题
单项选择题