Among them, the circled number 1-20. Most computer or mobile phone input methods can directly insert mathematical symbols, so I won't say much here. I mainly talk about the input method of the circled number 2 1-50.

Unicode encoding is required to convert the circled number 2 1-50 into characters. The following is the Unicode encoding of 2 1-50:

~? :& amp# 1288 1; & amp# 12882; & amp# 12883; & amp# 12884; & amp# 12885; & amp# 12886; & amp# 12887; & amp# 12888; & amp# 12889; & amp# 12890; & amp# 1289 1; & amp# 12892; & amp# 12893; & amp# 12894; & amp# 12895

Effect:? ; ? ; ? ; ? ; ? ; ? ; ? ; ? ; ? ; ? ; ? ; ? ; ? ; ? ; ? .

~? :& amp# 12977; & amp# 12978; & amp# 12979; & amp# 12980; & amp# 1298 1; & amp# 12982; & amp# 12983; & amp# 12984; & amp# 12985; & amp# 12986; & amp# 12987; & amp# 12988; & amp# 12989; & amp# 12990; & amp# 1299 1

Effect:? ; ? ; ? ; ? ; ? ; ? ; ? ; ? ; ? ; ? ; ? ; ? ; ? ; ? ; ? .

If you have the code, paste it directly at this time, or the code needs to be converted. The simple way to convert text through Unicode encoding is as follows:

First of all, through Baidu search Unicode coding conversion webmaster tool, click the first search result below.

Second, after input, enter the encoding to be converted in the Unicode encoding column. If it's too much trouble, you can post all the edited ones.

Third, click "Unicode to Chinese" on the right.

4. The effect after conversion is as follows. You can copy any symbol you need.