1, one liter and two summers linkage mathematics textbook is better than PEP. In terms of content quantity, the capacity of PEP is smaller than that of Qingdao. People's Education Edition has more knowledge of clock recognition than Qingdao Edition, but lacks knowledge of position recognition, statistics and comparison.

2. The content arrangement of the first-grade mathematics volume in People's Education Edition is less jumping and less difficult than that in Qingdao Edition. For example, the People's Education Edition arranges the understanding and addition and subtraction of 1 to 5 in the third unit, the understanding and addition and subtraction of 6~ 10 in the sixth unit, and the Qingdao Edition directly arranges the addition and subtraction of numbers within 10 in the third unit.