-Mathematically proficient students make sense of quantities and their relationship with problem situations
-Two abilities to solve problems involve quantitative relationships:
1. Decontextualize which is the ability to abstract a given situation and represent it symbolically and represent symbols as they have a life of their own
2. Contextualize which is the ability to pause in the process and think about the symbols involved
-Quantitative reasoning creates a representation of the problem, attends to the meaning of quantities, and knowing the appropriate properties of operations and objects
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