How to say decimal and unit conversion in the fourth grade of primary school mathematics by People's Education Press?
The counting unit of decimal places is one tenth (0. 1), which means several tenths (0.1); The counting unit of two decimal places is one percent (or 0.0 1), which means a few percent (or 0.01); The counting unit of three decimal places is one thousandth (0.00 1), which means several thousandths (0.001); ......