Sometimes a child can work out a question but all they are doing is following a series of instructions from their teacher on how to solve it.
This can leave the child unable to know why solving a question this way works, whereas that way doesn’t.
Often I find that during maths tutorials I have to take a step back to explain why solving a problem works in a certain way and why approach B or C won’t work.
This is in fact a very useful use of the child time. To understand the “why” before securing the “how”.