How many butterflies are in the group?
We could call this the group and count how many butterflies there are inside the group. We could also group the butterflies in another way to make it quicker and easier to count.
We could group the butterflies this way. Each group has two butterflies. So we could skip counting twos to count them: two, four, six, eight, 10 plus one more here makes 11.
There are 11 butterflies in the group.