First, draw mathematical patterns, such as numbers, squares and other shapes; Then draw a text box and write the relevant knowledge about mathematics.

Expand knowledge:

Summarize and sort out the knowledge points of the first unit of the fourth grade mathematics;

First, understand the number sequence table.

1, according to our country's counting habit, every four digits are counted from the right. (such as level, level, level. )

2. One, ten, hundred, thousand, ten thousand, one hundred thousand, one million, ten million, one billion, ten billion, one hundred billion and so on. Are all counting units. The counting units of each level are: 10, 100, 1000. The counting units of ten thousand categories are: ten thousand, one hundred thousand, one million and ten million. Billion-level counting units are: billion, billion, billion, and billion.

3. The position occupied by the counting unit is called digit. The digits of each level are 1, 10, 100 and 1000 respectively. Ten thousand digits are: ten thousand digits, one hundred thousand digits, one million digits and ten million digits. Billion digits are: billion, billion, billion, billion.

4. The propulsion rate between every two adjacent counting units is 10. This counting method is called decimal counting method.

5, 10 Ten thousand is one hundred thousand; 100000 is one million; 101 million is 10 million; 10 10 million is 100 million.

6, 10 One billion is one billion; 10 billion is10 billion; 1010 billion is100 billion.

7. From the right, the fifth place is 10,000; The ninth place is one billion.

Second, reading methods

1, reading, grading first. Starting with one digit, every four digits are one level. For example: (2496? 0000)

2. When reading, you should start from a high position and read down one level at a time. (Write capital figures. )

3. Reading methods of numbers within 100 million (including reading methods of two-level numbers): read 10,000 levels first, and then read one level. Ten thousand series should be read according to the reading method of ten thousand series, and then the word "ten thousand" should be added after it. No matter how many zeros are at the end of each level, don't read them; There is a zero or several zeros in other numbers, all of which are read by only one zero.

Third, the rewriting of numbers.

1. Rewrite the integer of 10,000 into a number with the unit of "10,000": grade one, and then omit the four zeros of each level and replace them with the word "10,000".

2. Rewrite the integer into a number with the unit of "100 million": first grade, then omit the eight zeros of each level and ten thousand levels and replace them with the word "100 million".