1. The understanding of measuring 1 mm decimeter is 2 kilometers, and the understanding of 3 tons is 2. Addition and subtraction within 10000 1 addition 2 subtraction 3 calculation of addition and subtraction 4 arrangement and review 3. Quadrilateral 1 quadrilateral 2 parallelogram 3 perimeter 4 estimation 4, division with remainder 1 meaning and calculation of division with remainder 2 problem solving 5. Understanding of time, minutes and seconds 1 s2. Fill in the blanks and talk about self-test (1) self-test (2) 6. Multiply multiple digits by one digit 1 oral multiplication 2 pen multiplication 3 finishing and reviewing 7. A preliminary understanding of the score of 65438+