Each of these sets of buttons has a corresponding set with four more. Learners examine pairs to determine which one has four more, checking it off. Consider also asking them to write down the specific number of each set to encourage number value concepts. Next, they practice beginning addition skills by counting sets of bows, adding four more, and calculating the total. There are two of these, and the sums are both single-digit. Again, having them write numerals beneath each set would be a helpful extension.