We are continuing to build our algebraic thinking. Below is an example of the work we did today, which involves identifying the "fact family", or all the possible number sentences for a problem where only one addend and the sum are known. We represent the unknown addend using a symbol (i.e. x). We then use subtraction to solve for it. The first problem is done. Can you complete the others?
Below the picture is a button that will link you to a game we played in class today.
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Below is an example of the way that a T table can help to solve a problem. Once an input/output equation is determined, you can solve for any term.
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AuthorMr. Long Archives
March 2019
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