Ratios & Ratio Tables

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What is a ratio?

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A ratio is a comparison of two quantities that shows the relative size of one quantity to another. It can be expressed in three ways: as a fraction (e.g., 3/5), with a colon (e.g., 3:5), or in words (e.g., 3 to 5).

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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Which of the following is NOT a way to write a ratio? 3 to 5, 3:5, 3 - 5

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3 - 5 is NOT a way to write a ratio.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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How do you find the ratio of pears to bananas and apples if there are 4 apples, 2 bananas, and 5 pears?

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The ratio of pears to bananas and apples is 5:6.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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What is the simplified ratio of girls to boys if there are 15 boys and 10 girls?

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The simplified ratio of girls to boys is 2 to 3.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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Which ratio simplifies to 4 to 7? 8 to 14, 16 to 17, 20 to 27, 40 to 77

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8 to 14 simplifies to 4 to 7.

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CCSS.6.RP.A.3A

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What is the ratio of apples to total fruits if there are 4 apples, 2 bananas, and 5 pears?

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The ratio of apples to total fruits is 4:11.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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If a recipe calls for a ratio of 2 cups of flour to 3 cups of sugar, how many cups of sugar are needed for 4 cups of flour?

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For 4 cups of flour, you need 6 cups of sugar (ratio 2:3).

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What is the ratio of boys to girls if there are 15 boys and 10 girls?

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The ratio of boys to girls is 3 to 2.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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If the ratio of cats to dogs is 4:5, how many dogs are there if there are 12 cats?

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If there are 12 cats, there are 15 dogs (4:5 ratio).

Front

What is the missing number in the ratio 3:__ = 6:12?

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The missing number is 6.