My daughter is also doing her homework in "100% training" in the first grade, but some math problems are confusing. You said the answer was this, but the teacher said no, so I had to go to the principal of the school with the math "grade one 100" and ask the principal to grade their math teacher after doing it. The result is not correct, even the headmaster can't do it. Can our parents understand? How many children are there?

What is this textbook? Are they all the results of calculating money in the market economy? Have schools, teachers or higher authorities ever reviewed these textbooks and let them poison children?