Four-year-old roger has been given six different toys, and his mother is working with him to learn to count using the toys. according to developmental psychologist rochel gelman, which skill would roger not exhibit? count the number of toys flawlessly and with precision show that even though he gets the “names” of the numbers wrong (ex. 1, 3, 6), he would be consistent, and he would be able to say that there are six toys in the group compare different quantities, and be able to carry out simple addition and subtraction show his mother that each toy is assigned just one number, and that each toy should be counted only once