Make early math practice fun and meaningful with this engaging set of Earth Day themed addition within 20 worksheets designed for young learners in Grades K–2. Students use the number line to solve each addition problem, helping build number sense, counting strategies, fluency, and confidence while practicing addition facts within 20 in a clear, easy-to-follow format. Each page includes kid-friendly Earth Day illustrations such as recycling symbols, nature scenes, clean energy items, plants, and