As for your doubts, you don't have to. The general school only cares about the total score, and the school has no right not to admit you, a child whose total score pushes down his score line because of failing math.
What you need to do most now is to find out the reasons for failing in math, whether it's tutoring or self-study, or looking for a senior, so that your children can keep up with the progress of school math in Grade One.
One wrong step, one wrong step. Children can no longer lose at the starting line of high school mathematics. Everything is tense! !