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

考试题库2022-08-02  20

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,结果正确的是( )。A:51.0 60.0 40.0-31.0B:51.0 60.5 40.5-31.0C:51.0 60.0 40.0-30.5D:51.5 60.5 40.0-31.0

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

答案 B

解析 将拟修约数X乘以2,按指定修约间隔对2X依2的规定修约,所得数值再除以2;例如:51.25-102.5-102-51.0;60.38-120.76-121-60.5;40.29-80.58-81-40.5;30.75-61.5-62-31.0;答案B正确
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