Ratios with Double Number Lines, Tables, and Review

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What is a ratio?

Back

A ratio is a comparison of two quantities, showing how many times one value contains or is contained within the other.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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How do you simplify a ratio?

Back

To simplify a ratio, divide both terms by their greatest common divisor (GCD).

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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What is the simplest form of the ratio 6:3?

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The simplest form of the ratio 6:3 is 2:1.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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If there are 6 yellow LEGOs and 3 red LEGOs, what is the ratio of red to yellow LEGOs?

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The ratio of red to yellow LEGOs is 1:2.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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What is a double number line?

Back

A double number line is a visual tool that shows two related quantities along two parallel lines, helping to understand ratios and proportions.

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CCSS.7.RP.A.2D

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How can you use a double number line to solve problems?

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You can use a double number line to find equivalent ratios and to determine how one quantity changes in relation to another.

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If 9 cups of raisins are used to make 6 loaves of bread, how many loaves can be made with 3 cups of raisins?

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You can make 2 loaves of bread with 3 cups of raisins.

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CCSS.6.RP.A.3B

Front

What is a ratio table?

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A ratio table is a table that displays pairs of numbers that form equivalent ratios.

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How do you find a missing number in a ratio table?

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To find a missing number in a ratio table, use the relationship between the known numbers to calculate the unknown.

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If 30 kids like grape juice and the ratio of kids who like pineapple juice is 4:3, how many kids like pineapple juice?

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40 kids like pineapple juice.