The focus of fourth grade mathematics learning is parallelogram, trapezoid and statistics, which is the difficulty of the first volume of fourth grade mathematics in primary school. Understanding of large numbers, multiplication and division of two digits and understanding of angles are the key points.
Main learning contents of fourth grade mathematics:
Understanding of 1 sum number. Understand numbers within 100 million, compare the sizes of multiple digits, and express large numbers, approximation numbers, positive numbers and negative numbers in units of 10,000 and 100 million.
2, the number of operations. (Two-digit multiplication, three-digit division, three-step mixed operation with brackets, counter)
3. explore the law. (Multiplicative commutative law, associative law, distributive law, additive commutative law, associative law, quotient invariant law)
4. Understanding of graphics. (Line segment, ray, parallel line, right angle, fillet) measurement. (measurement unit, draw angle with protractor, measure angle)
5, graphics and location. (Position, direction and distance are represented by several pairs on the grid paper to determine the position of the object)
6, graphics and transformation. (Simple comprehensive transformation of simple figure rotation of 90 degrees and translation rotation)
7. Simple statistics. (1 Grid represents bar charts and simple line charts of multiple cells.