(1)有一游标卡尺,主尺的最小分度是1mm,游标上有20个小的等分刻

1)有一游标卡尺,主尺的最小分度是1mm,游标上有20个小的等分刻度。用它测量一小球的直径,如图1所示的读数是                mm

⑵用螺旋测微器测量一根金属丝的直径,如图2所示的读数是               mm

 


答案

1050    2830

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