standard_description: Determine the unknown whole number in an addition or subtraction equation relating to three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = �� – 3, 6 + 6 = ��.
problem_activity: Stage 2: Puzzles
Required Preparation
Materials to Gather
Pattern blocks
Materials to Copy
Blackline Masters
Pattern Blocks Stage 2 Mat

Narrative
Students use pattern blocks to fill in puzzles where the edges of each shape do not touch.


aligns: no