1. In the mixed operation of fractional division or fractional multiplication and division, when you are divided by a number, just multiply by the reciprocal of this number.

2. When solving the application problem of fractional division, we should find out the quantity of unit "1", while the simple application problem of fractional division requires the quantity of unit "1".

3. The quantitative relationship of fractional division problem is: unit "1"× fractional rate = the quantity corresponding to fractional rate. When solving problems in detail, use equations and set the unit "1" as X. ..

4. When solving the application problem of fractional division, we can analyze the quantitative relationship with the help of line segment diagram. When drawing a line segment, draw the unit "1" first.

5. The calculation method of fractional division can be roughly divided into two types: one is that it can be gradually converted into multiplication, and then the fractional calculation can be carried out; The second one can be converted into multiplication at one time, and then the calculation is reduced. For division with fractions, it is usually enough to first change the fraction into a false fraction, and then select the first or second one for operation.

6. When multiplying scores, first look at whether there is a common divisor. If there is a common divisor, first cut the point until it is probably the simplest score. Molecule times numerator, denominator times denominator. If we can make some concessions, we will continue to make some concessions until we get the simplest score.