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50 new levels to try! Blue discs only subtract numbers along diagonal lines.
Red discs subtract numbers along horizontal and vertical lines.
More Math Games to Play
Sum Points 2 - Learning Connections
Essential Skills
Problem Solving - look for the best sequence of steps
Numerical Thinking - reason about numbers and perform mental math
Spatial Reasoning - use horizontal, vertical, and diagonal directions

Common Core Connection
MP1 - Make sense of problems and persevere in solving them.
MP7 - Look for and make use of structure.
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