Math is Real Life

I am linking up again with all the amazing gals of the Math is Real Life blog hop:  4mulaFunFourth Grade StudioTeaching to Inspire in 5th, AND MissMathDork.  I love this stuff!

Crepe Craving

So the other night, I had a craving for crepes and my grocery store had strawberries on sale!  Score!!  I went right home and searched for a new crepe recipe that works better with my crepe maker.  As I browsed Pinterest, I found this one that works oh so nicely…


Crepes with strawberries and bannana

The picture definitely grabbed my attention.  Doesn't it look divine??  Maria of The Mother Huddle knows what she's doing in the kitchen.  I have to admit though, sometimes I really hate trying recipes from Pinterest…they usually don't turn out or the directions are vague with too many assumptions (ie:  add one can–I am wondering what size of can?? sheesh)  This picture made me excited to try again.

Making a Ratio Table to Adjust the Recipe

I got the ingredients out and noticed that I had 4 eggs, but the recipe called for only 3.  I really didn't want to waste that one egg, so my mind turned to RATIOS!  Yes, I set up a ratio table so I could adjust the ingredients to 4 eggs and use that last one.

Here is the original recipe:

1/3 tsp salt

3 eggs

1-1/2 cups milk

1-1/2 cups all-purpose flour

2 Tbsp vegetable oil or melted butter

I needed to find out the measurements for one egg per every ingredient.  I divided all of the ingredients by 3 to find that answer as shown in my ratio table below.

Crepes Ratio Tables

After I found those amounts, I added them straight down the columns…making sure to change all denominators into like denominators so I could add.


Finding Equivalent Fractions

So you may be thinking 4/9 of a tsp is kind of a weird measurement!  I would agree, but let's reason through how I would add it to the mix.  If I look at the original measurement for 1/3 tsp of salt, I could in turn make that into an equivalent fraction of 3/9– which is close to 4/9.   I would measure out the original 1/3 tsp and add a pinch more.  Now for the 2/3 of a Tbsp, let's use unit conversions here.  There are 3 tsps in 1 Tbsp.  So you could use the tsp measurement and scoop it out twice.  1/3 Tbsp (1 tsp) + 1/3 Tbsp (1 tsp) = 2/3 Tbsp.

The results were fantastic!  Thanks to Maria for making yummy food and sharing with the world. I love this recipe and I hope you'll try it out at home and make a GIANT batch.  Math is everywhere 🙂

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