We usually use fractional rates, that is, every fractional rate is 1. Take 32 as an example, 3 refers to 30 and 2 refers to 2. For example, 32+9, which is a single digit, should be added to the single digit of 32, that is, 2+9= 1 1. When using the decimal rate, if the sum of two digits is greater than ten, it is 2+9- 10= 1 (unit). At this time, the ten digits are 3+ 1=4, which adds up to 32+9=4 1, which is 30+(2+9- 10)+650.

In addition, binary rate is commonly used, that is, every binary rate is 1, but in the binary rate algorithm, there are only two numbers: 0 and 1. Take 10 1 1 as an example, first add up the last few digits, 1. Therefore, when the sum of single digits is equal to 2 (the binary rate is only 1 and 0, so it cannot be greater than 2), the sum (that is, 2)-2=0, and the forward number is 1. Then add the penultimate digit, 1+ carry 1=2.