As a former math tutor to children in middle and high school, and now a father, I can tell you a way to avoid the problem completely. Gain an understanding of the concept yourself, and make an equivalent problem that uses the same steps/ideas. Walk them through step by step, explaining as you go. One or two example like that should be enough for them to understand well enough to do other work on their own.

This takes a bit more work, but it really teaches them. Most kids will be all too happy to just copy you or follow your lead and never gain an understanding of the work. The best way to avoid it is to do absolutely none of their actual work.

As a former math tutor to children in middle and high school, and now a father, I can tell you a way to avoid the problem completely. Gain an understanding of the concept yourself, and make an equivalent problem that uses the same steps/ideas. Walk them through step by step, explaining as you go. One or two examples like that should be enough for them to understand well enough to do other work on their own.

This takes a bit more work, but it really teaches them. Most kids will be all too happy to just copy you or follow your lead and never gain an understanding of the work. The best way to avoid it is to do absolutely none of their actual work.