问题 选择题

5.7+1.9-5.7+1.9=(  )

A.0

B.2.9

C.11.4

D.3.8

答案

5.7+1.9-5.7+1.9,

=(5.7-5.7)+(1.9+1.9),

=3.8;

故选:D.

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