The two counting units adjacent to 1 100 million are1100 million and1100 million, and the progress between every two adjacent counting units is 10. Counting units are, ten hundred, thousand, ten thousand, one hundred thousand, one million, ten million, one billion, ten billion, one hundred billion, one trillion, ten trillion, one hundred trillion, gigabit, Beijing, ten Beijing, one hundred Beijing, one thousand Beijing, one hundred Hong Kong, one hundred Hong Kong.
The number of digits in the integer part starts from the right, and every four digits are one level, and each level includes one digit, ten digits, hundred digits and thousand digits, indicating how many ones there are; Tens of thousands include tens of thousands, hundreds of thousands, millions and tens of millions, indicating how many tens of thousands there are; Billion includes one billion, one billion, one billion, one billion, which means how many billions.
The decimal places are decimal, percentile and thousandth from left to right. A few tenths, a few percent, a few thousandths.
The rule of decimal reading is that numbers within four digits can be read from the highest place along the rank, for example, 1987 is pronounced as 1987. Numbers with more than four digits are graded by four digits from right to left, and then the numbers in each level and their horizontal names are read out in turn from the advanced level.
There are zeros at the end of a number. No matter how many zeros there are, there are zeros at the end of any level after classification. When reading is needed, no matter how many zeros there are, only one zero is read, and no matter how many zeros there are in the middle, only one zero is read.
Brief introduction of counting unit
The unit of measurement refers to the scalar defined and adopted according to the convention, and any other similar quantity can be compared with it, so that the ratio of the two quantities can be expressed by a number. The unit of measurement has the name and symbol given according to the agreement.
All kinds of physical quantities have their own units of measurement, and the number of selected substances displayed under specified conditions is the standard of basic units of measurement. The choice of basic quantity can be different in different periods and disciplines.
For example, in physics, seven physical units, such as time, length, mass, temperature, current intensity, luminous intensity and quantity of matter, are taken as basic quantities, and their unit names are seconds, meters, kilograms, kelvin, amperes, Candeira and moles.