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Math Playground for Teachers
Combine number balls to make sums of 20.
Try to remove all addends before time runs out!
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Number Bonds 20 - Learning Connections
Essential Skills
Mental Math - practice quick recall of basic addition facts
Problem Solving - plan ahead to make as many number bonds as possible

Common Core Connection for Grades 1 and 2
Demonstrating fluency for addition within 20.
Use strategies such as counting on and making ten.
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