I use these as daily warm-ups. They are also great center activities. Each day, students step away from the standards (I know ... gasp), and just think. What do we teachers always say? Students just don't think anymore. We have to do everything for them. I don't help them with these at all. Students get excited doing something other than the same old math routine. Gets them fired up for learning.
It is a great way to introduce this activity to your students. There will be more packs to come with increasing difficulty. Happy thinking.