1, number sense: understanding the meaning of logarithm, counting unit and size, order, equality and inequality, synthesis and decomposition of numbers, etc.

2. Sense of quantity: perceptual knowledge of length, area, volume, time, quality and currency.

3. Symbol consciousness: I can understand and use symbols to represent numbers, quantitative relationships and changing laws, and know that using symbols can be used for operation and reasoning, and the conclusions are general.

4. Computing ability: the ability to correctly perform operations according to laws and operational rules, including understanding the arithmetic of operations and mastering the necessary operational skills.