People's education printing plate fourth grade mathematics page 85 example 5. What are the differences between the three methods of quotient test, which is simpler?
The first is to try quotient by treating divisor as an integer close to it; The second is multiplication test quotient; The third method is to treat the divisor as a special number close to it and use the basic mouth to calculate the trial quotient. Any method will do. Generally speaking, it is easier to estimate the divisor as a close tester than an individual.