I think that we have the number bonds from 1-10 down. Singapore also calls it factoring- it's basically just breaking numbers down into their parts. It's one of the early lessons in Primary Mathematics 1a, and you aren't meant to move on until it's firm according to the Home Instructor's Guide. We've used the Cuisenaire rods and some pages I made, and then we'll go through and use the workbook pages.
Yay, Sweet Pea!