Reduce each number to zero by placing subtraction discs on the grid
Blue discs only work along diagonal lines.
Red discs only work along
horizontal and vertical lines.
Sum Points - Learning Connections
Problem Solving - look for the best sequence of steps
Numerical Thinking - reason about numbers and perform mental math
- 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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