Solve problems involving ratios, rates and proportions, including making estimations.

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Use a ratio as a descriptive characteristic.

•Use a ratio as a descriptive characteristic.

•Compare the meaning of a ratio in different contexts.

•Use scaling to build proportions or find a missing value in a proportion.

•Simplify ratios to build proportions or find a missing value in a proportion.

•Use multiplicative reasoning to solve problems.

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