Ratios: Introduction

What is a Ratio?

• Is a comparison of two quantities

• To multiply two fractions

• Strictly a fraction

• Two decimals that can be multiplied

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

If there are 5 boys and 7 girls, write the ratio of girls to boys.

• 5 to 7
• 7 to 5
• 5 to 12
• 7 to 12

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

In the fruit bowl there are 4 apples, 2 bananas, and 5 pears.  What is the ratio of pears to ALL fruit?

• 5:4
• 5:11
• 2:5
• 6:5

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Which represents the relationship of oranges to fruit?

• 2:6
• 2:4
• 4:6
• 4:2

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

3 ways to write a ratio is.....

• read, write, demonstration
• to solve
• using to, using a colon, and as a fraction
• very important

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

How many different ways can you write a ratio

• 1
• 2
• 3
• 4

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CCSS.6.RP.A.1

A ratio can be written as all the ways below EXCEPT which one?

• 3=4

• 3:4

• 
  

  $\frac{3}{4}$

• 3 to 4

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CCSS.6.RP.A.1

On a human, what is the ratio of arms to fingers?

• 10:2

• 2:10

• 2:5

• 5:1

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

What is an equivalent ratio?

• Two or more ratios with the same values
• Two or more ratios that have different values
• Two or more ratios that equal 1
• Two or more ratios that have a denominator of 1

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CCSS.6.RP.A.1

CCSS.6.RP.A.3

Which ratio is equivalent to 5 to 4

• 25 to 20
• 10 to 12
• 4 to 5
• 15 to 8

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

CCSS.6.RP.A.3