Rounding, factor multiple, median, mode or average, quantity and measurement, fraction, decimal, reciprocity of percentage and proportion, pigeon hole principle, judging whether it is proportional and the nature of proportion.

1. Find the approximate value, rewrite the unit with "ten thousand" and "one hundred million" or omit the mantissa or rounding after "ten thousand" and "one hundred million" and the composition of numbers.

2. Median, mode or average.

3. Factor multiples (focusing on prime number, composite number, even number, odd number, prime number, greatest common factor and least common multiple).

4. Quantity and measurement.

5. Conversion between fractions, decimals, percentages and ratios.

6. scale.

The chicken and the rabbit are in the same cage.

8. Dove cage principle.

9. Calculation of the relationship between current price and original price (with emphasis on discount).

10, find each one and score it.

Xiaoshengchu's mathematical problem-solving methods:

1, inspection of operation skills.

2. Geometric intuitive observation.

3. Investigation on reasoning and deductive ability.