Surprising because I have seen few 6 years olds can do multiplications and divisions. If I'm not mistaken, standard US 1st grade curriculum expects kids to be familier with only addition below 100 and subtraction in low teens.
My kid took an evaluation test in elementary school to see what they already knew. He hadn't been taught long division yet, but when he was presented with the problem he figured it out on the spot. The teacher thought that was remarkable enough to bring to my wife's attention.
