1、小数计数单位即分位上的最小量。小数的计数单位有0.1,0.01,0.001,0.0001,0.00001等等。
2、小数的数位:十分位,百分位,千分位,万分位等等,小数最大的计数单位是0.1。没有最小的计数单位。
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