The first step is to draw two adjacent rectangles.

Step 2, then draw two vertical lines and divide each rectangle into three equal widths.

Step 3: Next, enter "Unit" in the rectangular box in the upper right corner.

Step 4, add "10 digits" and "100 digits" to the left in turn.

The fifth step, in this way, the digital chart is done, and students can know the numbers by filling in the numbers.

Counting lines is a learning tool to help pupils understand mathematical reasoning.

Source of data cable:

In the primary school mathematics textbook published by Beijing Normal University, the number line is used as a learning tool to help primary school students understand mathematical reasoning. The number axis has been introduced into textbooks since the first grade. Considering the age characteristics of the students in Grade One, the first volume of Grade One has similar physical drawings, and the second volume of Grade Two has similar "ruler" lines.

In fact, the number axis is the "prototype" of the number axis. Using the number line, we can not only know the order and comparative size of numbers, but also calculate: "Decrement" is equivalent to addition, and "Decrement" is equivalent to subtraction. Therefore, digital lines are of great value.

Three elements of a digit line:

1, take any point on the horizontal line as the reference point, and express it with o.

2. Moving from the reference point to the right is positive, and the opposite direction is negative.

3. A point with a unit length from point O in the forward direction is represented by 1.

Activity 1 indicates location.