Four situations of planting trees:

1. If trees are planted at both ends of the tree planting line, the number of trees planted should be more than the number of segments to be divided 1, that is, the number of trees = the number of intervals+1.

2. If only one end of the tree planting line is planted with trees, then the number of trees is equal to the number of segments to be divided, that is, the number of trees = the number of intervals.

3. If no trees are planted at both ends of the tree planting line, the number of trees planted is less than the number of segments to be divided 1, that is, the number of trees = the number of intervals-1.

4. If trees are planted on both sides and ends of the tree planting route, the number of trees planted should be more than the number of segments to be divided 1, and then multiplied by 2, that is, trees = number of segments+1 and then multiplied by 2.

Planting trees is one of the classic types of mathematical application problems in primary schools. He is actually a mathematical model in the process of mathematics learning. After mastering this model type and solution method, mathematical problems similar to tree planting problems can be solved by this type of method.

Because of its many classifications, many students can't know what kind of tree planting problem they belong to when solving practical problems in the learning process, which leads to poor problem-solving efficiency. Then, if you want to solve the related questions about tree planting, you must have a clear understanding of the classification and concept of the index problem.

For planting trees at equal intervals, two of the total distance, interval number and plant distance are known, and the third quantity is required. This application problem is called planting trees. The main problem to be solved is the relationship between interval number and tree, which is different in different States.