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6.RP.A.1
Understand the concept of a ratio and use ratio language to describe a ratio relationship between...
6.RP.A.2
Understand the concept of a unit rate $a/b$ associated with a ratio $a:b$ with $b \neq 0$, and...
6.RP.A.3
Use ratio and rate reasoning to solve real-world and mathematical problems, e.g., by reasoning...