Second, the divisor is the division of one digit (oral integer ten, integer hundred divided by one digit; Division estimation; Divider is a written calculation of one-digit division; Division of 0; Calculation of division)

Third, statistics (the horizontal axis is the statistical chart of data; The data in the first grid is unevenly distributed with other grids; Analyze according to statistical data; Average) 4. Year, month and day (year, month, day and 24: 00 time method) 5. Two digits.

6. Area (area and area unit, area calculation, area unit rate, hectares and square kilometers)

Preliminary understanding of decimals (reading and writing decimals and simple calculation of decimals)

Eight, solve the problem (even by, even in addition to the problem)