For example: 1+2=3 This formula means that 1 plus 2 equals 3. We need to put it with sticks. We put 1 stick, representing the number 1. Let's put two more sticks to represent the number 2. We put three sticks to represent the number 3. We use a stick to deduce the formula 1+2=3. Similarly, we can make other formulas with sticks.

For example: 4-2=2 Let's put four sticks to represent the number 4. We took two sticks from it to represent subtraction. We put two sticks to represent the number 2. In this way, we deduced the formula 4-2=2 with a small stick.

For the first-grade children, the formula may be a strange and magical existence. Some formulas look simple, such as "1+2=3", but they are a key for children to explore the unknown world. In an interesting and exploratory math class, the teacher guided the children to put formulas with sticks.

The children took out a stick, which represented the number "1". Then, they put two more sticks, which added up to the number 2 ". Finally, when they put two sets of sticks together, an intuitive image appeared: 1+2=3. This process makes children deeply understand the meaning of addition and the connection between numbers and objects.

Subtraction can also be presented with sticks. When the children took out four sticks to represent the number "4" and then took out two sticks, they intuitively felt the significance and practical effect of subtraction. Finally, they took out the remaining two sticks and clearly demonstrated the formula "4-2=2".

In this way, the stick became a right-hand man for children to understand the formula. They help children understand the meaning of formulas in an intuitive and vivid way, and stimulate their interest and love for mathematics. This teaching method can not only make children study happily, but also enable them to master mathematics knowledge in practice.