将数据51.25、60.38、40.29、-30.75 进行0.5单位修约，修约

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问题将数据51.25、60.38、40.29、-30.75 进行0.5单位修约，修约到个位数，结果正确的( )。A.51.0 60.5 40.5 -31.0 B.51.0 60.0 40.0 -31.0 C.51.0 60.0 40.0 -30.5 D.51.5 60.5 40.0 -31.0

选项 A.51.0 60.5 40.5 -31.0
B.51.0 60.0 40.0 -31.0
C.51.0 60.0 40.0 -30.5
D.51.5 60.5 40.0 -31.0

答案 A

解析

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