Addition: Remember the large numbers in your mind and count the decimals up, for example, 4+2= remember 4 in your mind, count up two numbers, 5 and 6, and then get the result 4+2=6.

Subtraction: Remember large numbers in your mind, and remember decimals downward, for example, 6-3= 6 in your mind, the number from the bottom, 5, 4, 3, and then get the result 6-3=3.

Second, use decomposition skills to teach children from decomposition to combination

When you separate the numbers and express them in words, you must say them with your mouth. The child who can tell them shows that she really has them. Start with less than 5, start with decomposition 2, and end the statement after each separation. Remember to combine them.

Third, parents can integrate life into their children's math learning.

For example, go to the supermarket to buy pears, let the children choose and count for themselves. After returning home, parents can ask their children to wash two pears. After everyone finishes eating, ask their children how many pears are left. In this way, letting children unconsciously contact and learn mathematics in life can improve their interest in mathematics and help them understand the importance of mathematics in life.

Extended data:

Kindergarten education curriculum:

I. Scientific exploration activities:

In cooking, playing with sand, playing with water, scientific experiments and other activities, children gain the ability of scientific inquiry by comparing, classifying, looking for causality, feeling the relationship between things, experiencing the process of inquiry and creation. Teachers should encourage children to observe the process of things changing, guide children to discuss the observed results, and ask questions when children predict the results, so as to arouse children's thinking.

Second, large-scale sports activities:

Develop children's sports skills such as throwing, jumping, running and crawling in indoor and outdoor activity areas, so that children can truly feel the composition of various parts of the body and how they coordinate their actions, thus deepening their understanding of sports.

Third, artistic activities:

In the art activity area, children can doodle, tear or cut paper, draw with pigments or make models with clay. Through artistic creation, children can improve their hand control ability, which is conducive to the cultivation of pre-writing ability. At the same time, art activities are also conducive to helping children feel the texture and structure, shape and color of objects, so that children can gain experience in mathematics learning.

Fourth, drama games:

By playing the role in life, let children try to understand and control their own world, experience the joy of sharing, improve their ability to solve problems, and release the tension and pressure in life. Children can also try to adapt to the outside world by imitating events in daily life.

Five, building block games:

In the game, children decide what size and shape materials to use, plan and arrange the construction process, and pay attention to the application of construction skills. They can solve problems with their peers through measurement and calculation, and experience the happiness of sharing or cooperation.

Sixth, reading activities:

Children begin to realize the power of language when they express their feelings, share their views, and convey emotions such as like or fear. When children listen to music or enjoy poetry, they can get pleasure from reading.

Guangming daily-let the history of mathematics enter the primary school mathematics classroom

CCTV- Life Teacher-Dedicated to my primary school math teacher.