Let's Talk About Ratios
Marissa Hamilton[br]Standards: MAFS.6.RP.1.1[br][br][size=150][b]A ratio compares two quantities. [br][/b][/size]This can also be said as; a ratio compares two values[br][br]Later we will learn about the different formats of a ratio...yay![br][br]But first let's meet Sally!
[size=150][b][size=100]Sally decided to host a bake sale. She only offered chocolate chips cookies and sugar cookies at her bake sale. [br][br][/size][/b][b]The image below shows how many cookies were left over by lunch time. Use the image to follow along with the story and answer the questions. [br][br][/b][b]Let's call each chocolate chip cookie "c.c." and let's call each sugar cookie "sugar"[/b][/size]
[b]We see that there are 2 c.c. and 3 sugar, giving us a total of 5 cookies. Let's think about how we can use what we already know to form ratios. [/b]
First, let's compare the chocolate chip cookies to the sugar cookies. [br][br]There are a few ways that we could show the ratio of c.c. to sugar[br][br]EX. [br][br][math]\frac{2c.c.}{3sugar}[/math] OR 2:3 OR 2 to 3[br][br]In the above example, the ratios are simply comparing the number/quantity of chocolate chip cookies to the number/quantity of sugar cookies.
[size=150][b]Think of it this way:[br][br]"a" represents the first quantity, while "b" represents the second quantity[br][br]Knowing this, the ratio of [u]a to b[/u] can be written as:[br][br][/b][/size][size=150][math]\frac{a}{b}[/math][b] OR a:b OR a to b[/b][/size]
[size=200]NOW Let's Practice![/size]
Do you remember Sally? Well let's find the ratio of the number of chocolate cookies to the total number of cookies.[br][br]pick all that apply
[size=100][size=150]Great Job with that question, practice makes perfect!![br][br]--- [br][br][/size][/size][size=150][b][size=200]You would never believe this...[/size][/b][/size][size=100][size=150][br] [br][b]Sally's neighbor, Lisa, wanted to thank Sally for having the bake sale. Lisa brought over an assortment of desserts. Sally decided to combine her leftover cookies AND the desserts that Lisa brought over. The picture below shows all of the treats. Yummy![/b][/size][/size]
[b]In fraction form, what is the ratio of chocolate chip cookies to cupcakes?[br][br]Make sure to include the variable names (cc and ccake)[br]Simplify, if necessary[br]do not[/b] include spaces in your answer[br]use the forward slash "/" to separate the numerator and the denominator
[b]In a:b form, what is the ratio of chocolate chip cookies to total number of treats?[br][br]No need to include variable names[br]Simplify, if needed[br][br]do not include spaces in your answer[/b]
[size=200]Remember:[br]A ratio ----- two quantities. [br][br]A ratio can be written as:[br]--- OR [math]\frac{a}{b}[/math] OR a to b[br][br]...oops, it looks like I forgot to finish the definition of ratio AND missed one of the ratio formats.[br][br]With the last two question, help me fill in the blanks[br][br][/size]
[b][size=100][size=200][size=150]A ratio does what with two quantities?[/size][/size][/size][/b]
[b][size=150]What was the missing ratio format that I forgot? [br][br]do not use any spaces[/size][/b]