The first unit is the number in life. On the basis of children's counting experience, combined with the specific situation, we can understand the meaning of numbers within 10, recognize, read and write numbers from 0 to 10, use them to represent the number of objects or the order of things, initially understand the meaning of cardinality and ordinal number, feel the close relationship between "number" and life, experience the fun of learning mathematics, and initially form good study habits.