1. First, write the title text of "Mathematics" in the upper left corner of the handwritten newspaper screen, then draw the decorative title text in the upper left corner of the handwritten newspaper screen with a pencil, and draw grass, petals and other patterns at the bottom as edge lines.
2. Then draw a rectangular book pattern border in the lower left corner of the handwritten newspaper picture, and draw a ruler pattern in the middle of the handwritten newspaper picture to decorate the border effect.
3. Then draw a tree pattern in the lower right corner of the handwritten newspaper picture, draw a balloon pattern decoration effect in the blank part on the right side of the handwritten newspaper picture, and decorate it with a petal pattern in the middle of the bottom.
4. After the line drawing is completed, it is the coloring step. The title text on the left side of the handwritten newspaper screen is painted yellow, and the grass below the handwritten newspaper screen is painted yellow-green. The background color of the rectangular box on the left is painted gray, and the cloud in the upper right corner is painted blue.
5. Then paint the pencil pattern in the upper left corner of the handwritten newspaper screen with pink and gray, and paint the balloons decorated on the right side of the handwritten newspaper screen with pink, blue and yellow.
6. Finally, draw a grid line in the rectangular border in the lower left corner of the handwritten newspaper screen, thus drawing a beautiful mathematical handwritten newspaper.
1, definition and characteristics
Rational numbers consist of integers and fractions, which can be expressed by fractions, and the denominator of fractions cannot be zero. Rational numbers include positive integer, negative integer, zero sum and fraction. For example, 1, -3 and 1/2 are rational numbers.
2. Representation on the number axis
On the number axis, rational numbers can be expressed by the position of points. Integers can directly represent points on the number axis, with positive integers on the right, negative integers on the left and zero origin. Fractions can be converted into decimal form, and then the corresponding points are marked on the number axis.
3. Rational number operation
The addition, subtraction, multiplication and division of rational numbers all follow specific rules. For example, when adding rational numbers, first find the common denominator of two numbers, and then add them according to the same denominator. Multiplication and division also have corresponding operation rules, and rational numbers can be converted into fractions for calculation.
4, the nature of rational numbers
The set of rational numbers is closed, and the sum, difference, product and quotient of two rational numbers are still rational numbers. Rational number sets satisfy commutative law, associative law and distributive law.
5. Rational Numbers and Real Numbers
Rational numbers are subsets of real numbers, which include rational numbers and irrational numbers (numbers that cannot be represented by rational numbers). Irrational numbers are numbers that cannot be expressed by integers or fractions, such as π and √2.
6. Application area
Rational numbers are widely used in daily life and mathematics. In the fields of calculation, measurement, finance, architecture and so on, rational numbers are often used for accurate calculation and measurement. In algebra and geometry, rational numbers are used to solve equations and calculate coordinates.