I don't think those questions are representative of a child who should go into 6th grade math.
I have a child in 4th and they do long division starting in 3rd with basic remainders, then it gets more advanced with double digit and triple digit division by double digit divisors with remainders, area, perimeter, volume, metric measurement, estimating etc.
I didn't see anything that we covered in 4th on there and it seems more like what our state covers in 3rd as well, with some overlap in 4th. Mostly 3rd though.
