1, understanding of numbers: When reviewing the related knowledge of numbers, children must be helped to build a complete knowledge system, which needs to be understood and used after completion.

2. The meaning and classification of integers and fractions. We need to know and remember what are the definitions of integers and fractions, what are their meanings, and what are the classification of fractional integers, such as integers with odd and even compound prime numbers, as well as natural numbers and negative numbers. For example, scores include true scores, false scores, scored scores and negative scores.

3. Numbers and counting units. The content of this block is not too much to examine, but we should master the classification of progressive rate and the counting unit between digits. Sometimes it involves solving problems with numbers in exams.

4. Read, write and rewrite numbers. Numbers include integers, fractions, decimals and negative numbers. Be sure to master the reading and writing methods of all numbers, what to pay attention to when reading and what to pay attention to when writing. What should I pay attention to when rewriting? Be sure to read the units behind carefully and then rewrite them with rounding.

5. Basic properties of fractions and decimals. Often examine the nature of fractions and decimals. Students need to know what these two attributes are and what to pay attention to first. The zero at the end after the decimal point can be removed, why can't the previous one be removed? Multiply or divide by the same number, the size of the score remains the same, so what happens when you add it together or subtract it together? In addition, we need to pay attention to the law that the movement of decimal point leads to the change of numbers.

6. Factors and multiples. Factors and multiples are the contents of the second book of grade five. Although the content is not much, it is difficult to understand, so we must work harder on this piece of content. After all, this piece of content is still the basis of junior high school learning. It is also difficult and skillful to do problems with the greatest common factor and the least common multiple.