1, number sense and counting, number sense refers to being able to think and work with numbers easily, and understanding the various uses of numbers and the relationship between numbers helps children understand all aspects of mathematics;
2, measurement, measurement practice, can understand the specific size of things and learn how to express them in units of measurement;
3. Geometry and sense of space. Geometry describes the world people live in, classifies it, and guides children to know the shape, size and direction by observing the world around them.
4. Sense of space, which is beneficial to the cognition of space in the future;
5, scores, scores represent a part of the whole, providing a way of thinking for tall children.
Reflections on the teaching of fractional addition and subtraction 1
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