Looking for a new way to help your students develop addition, subtraction, and number sense skills? Your first grade students will absolutely love these WINTER color by code activities that focus on 1st grade math concepts. These fun NO PREP First Grade Math Worksheets are aligned to the Common Core Math Standards. Students will practice missing addends, subtraction, and number sense. These pages can be used as an independent activity. These pages can be used as morning work, homework, an independent center activity, or as an early finisher. Students will practice important math concepts and feel like they are completing a fun coloring page!