1. First of all, in the teaching content, the first volume of the sixth grade mathematics of People's Education Press closely combines the mathematical application problems in real life, and combines abstract mathematical concepts with practical problems to help students better understand and apply mathematical knowledge. For example, in the part of arithmetic and numerical calculation, students are taught to use mathematical methods to calculate by letting them solve practical problems in daily life, such as shopping and conversion, so as to cultivate their calculation ability and practical ability.
2. Let the students know the characteristics of a circle: radius, diameter and center. Understand the relationship between radius and diameter in the same circle. You should know that a circle is an axisymmetric figure with countless symmetry axes, all of which pass through the center of the circle. Knowing that there is a circle in life makes our life better. Know concentric circles and equal circles. You should know that the position of the circle is determined by the center of the circle, and the size of the circle is determined by the radius or diameter. Equal circles have the same radius and different positions; Concentric circles have different radii and the same position.
3. Make students know the meaning of circumference and pi, master the calculation formula of circumference and calculate circumference correctly. This paper introduces Zu Chongzhi's achievements in the study of pi, and permeates patriotic education. In practice, if the diameter or radius can be calculated according to the circumference of a circle, the circumference of a semi-circle can be calculated: the circumference of a circle × 1/2+ diameter. Find the perimeter of the combined figure. Understand the meaning of the area of a circle, experience the derivation of the formula for calculating the area of a circle, and master the formula for calculating the area of a circle.
4. Know the meaning of percentage: the number that indicates that one number is the percentage of another number is called percentage. Percentages are also called percentages or percentages. Percentages are usually not written in the form of fractions, but expressed by percent sign "%"; Percentages are sometimes defined as fractions with the denominator of 100, but there is a difference between percentages and fractions.
5. Fraction can represent both specific quantity and multiple relation between two quantities; However, percentage can only represent the multiple relationship between two quantities; So it is an unnamed number, that is, a number that cannot take units.