First, the ruler
A ruler is a tool for measuring length. The common length of a ruler is15cm or 30cm. In mathematics learning, a ruler can be used to measure the length of line segments to help students understand the relationship between values. When using a ruler, it is necessary to aim the starting point of the ruler at the measured object and read the scale on the ruler to get the accurate length.
Second, the ruler.
A ruler is a tool for drawing straight lines and measuring length, usually 30 cm long. In mathematics learning, we often use a ruler to draw pictures, pictures and parallel lines. When using a ruler, you need to align the edge of the ruler with the edge on the drawing paper, and keep the pen or pencil parallel to the edge of the ruler, so as to get a straight line and accurate length.
Third, protractor
A protractor is a tool for measuring angles, which usually includes semi-circular and full-circular. In mathematics learning, protractor is often used to measure the size of angles and draw graphs with specific angles. When using the protractor, it is necessary to aim the center of the protractor at the vertex of the angle, and then read the scale value on the protractor to get the accurate angle.
Fourth, calculators
Calculator is a tool for numerical calculation and operation. In mathematics learning, calculators can help students perform basic operations such as addition, subtraction, multiplication and division, and solve some complicated calculation problems. When using the calculator, you need to input the numerical values and operation symbols correctly, press the corresponding function keys, and then read the calculation results.
Five, origami tools
The origami tool includes origami and ruler, which are used for origami operation. In mathematics learning, origami can help students understand the essence of geometric shapes and construct them. When using the origami tool, you need to fold according to the specified steps to keep the crease neat and accurate.
To sum up, the tools commonly used in fourth-grade mathematics learning are rulers, rulers, protractors, calculators and origami tools. These tools can help students to measure length, draw, measure angle, perform numerical calculation and origami operation, and improve students' mathematics learning effect and understanding ability.