Missing Addends Math Activity for Elementary Students #3405133 (License: Personal Use)

This educational worksheet features three problems: one completed example (54 + 26 = 80), a double unknown addition problem (? + ? = 100), and a subtraction problem (? - 15 = 63). Three answer choices-39, 78, and 61-are displayed on colorful sticky notes for students to select and place. The layout encourages critical thinking and number sense development in early math learners.

Commonly used in K-3 classrooms during math centers, small-group instruction, or as a formative assessment tool; supports Common Core standards for operations and algebraic thinking by reinforcing inverse relationships and mental math strategies.