Requirements:

(1) Review the relevant knowledge of the whole first learning period in sorting out and reviewing.

(2) Review the division of two digits multiplied by two digits, the division of one digit and the addition and subtraction of decimals, compare the size of decimals and the vertical calculation of addition, subtraction, multiplication and division, and further cultivate students' sense of numbers through estimation.

Key points: two digits are multiplied by two digits, and the divisor is a division calculation of one digit.

2, space and graphics:

Requirements:

(1) Review the relevant knowledge in the field of "space and graphics" in the first issue, further develop students' spatial concept, and urge students to build a systematic cognitive system in this field.

Key points:

(1) You can draw simple axisymmetric figures on paper.

(2) Using the area formulas of rectangle and square skillfully to calculate the given area of rectangle and square.

(3) Further master the method of estimating and measuring the graphic area with self-selected units.

(4) According to the actual problems in life, the calculation methods of perimeter and area of rectangle and square are reasonably used to solve the perimeter and area problems in practical problems.

3, statistics and average problem:

Requirements:

(1), once again go through the process of sorting out and analyzing data, so that students can consolidate the method of drawing simple statistical charts and recording data with the word "plus", understand simple statistical charts, analyze and infer data simply, and learn to calculate the average value according to the collected data.

(2) Feeling hands-on experiment is an effective way to get scientific conclusions. Learning and analyzing simple data information can stimulate students' enthusiasm for learning and further cultivate their awareness and ability to cooperate with others.

Key points:

Drawing method of statistical chart; How to make a correct guess and judgment on the result of one thing?