1, through the average operation of some objects, experience the process of remainder generation and understand the meaning of remainder preliminarily; Explore and master the method of quotient of division with remainder, know that remainder must be less than divisor, use vertical method to calculate divisor and division with remainder, and use division with remainder to solve simple practical problems.

2. By observing the clock face, we can know the units of time: hours, minutes and seconds, and know that 1 hour is equal to 60 minutes, and 1 minute is equal to 60 seconds. We can tell the time displayed on the clock face, initially establish the concept of time, and experience the connection between mathematics and life.

3. Through the operation of the learning tool, know the number within 1000, know the digit order within 1000, and know the counting unit of the number within 1000 and the advancing rate between adjacent units; Can read and write numbers within 1000, and compare the sizes of numbers within 1000; According to the meaning of the number, you can orally calculate the whole hundred plus the whole hundred (and within 1000) and the corresponding subtraction, the whole hundred plus the whole ten and the corresponding subtraction.

4. Through independent exploration, master the written calculation method of adding and subtracting three digits, use the vertical calculation and addition within 1000 and the corresponding subtraction problems, orally calculate the whole ten plus the whole ten (and above 100) and the corresponding subtraction, estimate some formula problems of adding and subtracting three digits, and check the addition and subtraction operations.

5. In the real situation, using addition and subtraction, we can further understand the phase difference relationship between quantities and correctly answer the simple practical question "How many numbers are more (less) than a number".

6. Understanding the concept of "multiple" in connection with the meaning of multiplication can solve the simple practical problems of "how many times is one number another" and "how many times is one number".

7. In the real situation, I have mastered the method of analyzing the quantitative relationship, and can correctly answer some practical problems calculated by multiplication and addition (subtraction).

8, contact life experience, know decimeter and millimeter in observation and operation activities, know the relationship between decimeter and millimeter, meter and centimeter, make simple conversion between some length units, and choose appropriate length units to measure and describe the length of objects.

9, contact the existing understanding of the east, south, west and north, further understand the southeast, northeast, southwest and northwest, and be able to use the learned locative words to reasonably describe the positional relationship between objects in real situations or simple plans; Can read simple road maps and describe simple walking routes according to requirements.

10, contact the surface of some typical objects, get a preliminary understanding of angles and right angles, know that angles have vertices and sides, know that angles have sizes, know right angles, acute angles and obtuse angles, and draw angles on grid paper.

1 1, the same set of data will be classified according to different standards. Knowing that filling in forms and drawing boxes are both ways to present statistical results, we will use statistical results for simple judgment, association and prediction.