1. Be sure to master the basic knowledge. The basis of number is the basis of number sense. Children need to have certain number concepts and calculation skills in order to better experience mathematics and cultivate number sense. Therefore, in half a year's time, we should first learn the child's basic knowledge of mathematics well and check and sort out her mistakes. When necessary, you can help children learn to master basic knowledge through professional courses, online search for teaching materials or consulting educational experts.

2. Pay attention to children's mathematical thinking training. Mathematical thinking is an important part of number sense, including analysis, reasoning and problem solving. In this regard, teaching children thinking training should run through the whole process of mathematics learning, so that children can establish good mathematical thinking and master problem-solving methods, which can help children to be more confident and help improve her sense of numbers.

3. Cultivate children's sense of number from multiple angles. Mathematics is often abstract, so children need to be exposed to mathematics from many angles, such as playing interesting math games, making math models and making math inventions. Closely link mathematics with life, improve children's interest and participation, and make it easier for children to accept mathematics learning.

4. Make a scientific study plan. There should be some planning within half a year. Children need to have a scientific study plan, define their study goals and complete the plan within a specified period of time, which can help children develop their sense of numbers quickly in a short time.

Generally speaking, children need a systematic and scientific study plan, pay attention to their mathematical thinking training, guide them to get in touch with mathematics from multiple angles, let them play middle school and feel the fun of mathematics, which can really improve their sense of numbers quickly.