Arithmetic Tree Planting

Promote people to plant trees, encourage people to love trees, remind people to pay attention to trees, and cultivate children's environmental awareness from an early age
Let the children learn in happiness
This is a simple addition and subtraction learning to improve the child's digital cognition, plus: let the child add all the trees planted. Minus: Compare the difference in the number of trees planted by the children, of course, if you can’t figure it out, you can click the prompt button