SQL & PL/SQL :: Precision Greater Than Actual Value

When we are trying to create number data type column of a table with precision greater than actual value,it's accepting the definition of the table . But we are unable to insert any values into the table.how internally it stores the value

SQL> drop table precision_test;
Table dropped
SQL> create table precision_test(name number(2,5));
Table created
SQL> insert into precision_test values (1);
insert into precision_test values (1)
[code]....