Introduction to Ratios and Proportions Flashcard

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division, expressed as 'a:b' or 'a/b'.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

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

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

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CCSS.7.RP.A.2A

Front

How do you find an equivalent ratio?

Back

To find an equivalent ratio, multiply or divide both terms of the ratio by the same non-zero number.

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CCSS.6.RP.A.3A

Front

What is the simplest form of the ratio 12:18?

Back

The simplest form of the ratio 12:18 is 2:3.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If a room is 22 feet long and 19 feet wide, what is the area?

Back

The area is 22 feet * 19 feet = 418 square feet.

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CCSS.3.MD.C.7B

CCSS.4.MD.A.3

Front

How do you convert a decimal to a fraction?

Back

To convert a decimal to a fraction, write the decimal over its place value and simplify.

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CCSS.7.NS.A.2D

CCSS.8.NS.A.1

Front

What is the relationship between ratios and fractions?

Back

Ratios can be expressed as fractions, where the first term is the numerator and the second term is the denominator.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is the scale factor in a proportional drawing?

Back

The scale factor is the ratio of a length in the drawing to the corresponding length in the actual object.

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CCSS.7.RP.A.2C

Front

How do you round a number to the nearest hundredth?

Back

To round to the nearest hundredth, look at the third decimal place; if it's 5 or more, round up.

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CCSS.5.NBT.A.4