The core literacy of primary school mathematics tree planting is to respect the subject, give it to children in class, cultivate children's independent thinking and analysis ability, and form the habit of questioning and solving doubts.

Tree planting problem formula:

(Plants at both ends): distance ÷ interval length+1= number of trees.

Interval length × (number of trees-1 )= total length

(Only plant one end): distance ÷ interval length = number of plants.

(Not planted at both ends): distance ÷ interval length-1 = number of plants.

Calculation of correlation

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.

5. When planting trees on a closed line, the number of trees is equal to the number of line segments, that is, the number of trees = the number of intervals.

6. Plant trees on a square line, if every vertex should plant trees. Then the number of trees = (number of trees per side-1) × number of edges.