(单选题)
下面是按―四舍六入五凑偶‖的舍入规则把各有效数字取为4位,正确是的()
A21.495=21.50,34.465=34.47,6.1305×105=6.131×105
B8.0130=8.013,1.798501=1.798,0.0028760=0.0029
C8.0130=8.013,1.798501=1.798,0.0028760=2.876×10-3
D21.495=21.49,34.465=34.46,6.1305×10^5=6.131×105
正确答案
答案解析
略
A21.495=21.50,34.465=34.47,6.1305×105=6.131×105
B8.0130=8.013,1.798501=1.798,0.0028760=0.0029
C8.0130=8.013,1.798501=1.798,0.0028760=2.876×10-3
D21.495=21.49,34.465=34.46,6.1305×10^5=6.131×105