Tag: kitchen

  • Fractions Aren't Exact!

    Fractions Aren't Exact!

    I make Texas shaped waffles every Saturday morning. But this weekend I ran into a snag. The recipe called for 2 cups of Bisquick and I only had 1 1/4 cups left!

    Break out the fractions!

    “This shouldn’t be a problem,” I thought. “I’m good with fractions. I’ll just scale down the whole recipe.”

    2 cups is the same as 8 quarter cups. I have 1 1/4 cups of Bisquick — or five quarter cups.

    So I need to break the other ingredients down into eight pieces and only use five of them.

    This is the thinking that most math people would translate into, “I need 5/8 of the whole recipe.”

    Sounds good!

    Until I saw the other ingredients…

    • 1 1/3 cups milk
    • 1 egg
    • 2 tablespoons oil

    For real?!

    Here’s how I thought about the fractions in the 1 1/3 cups milk:

    Since I need 5 of the eight pieces, I need 5 of the 1/6 cups. Grief!

    “Don’t panic,” I thought, “4 of the 1/6 cups give me 2/3. And 5/6 is pretty close to 1. So let’s just estimate the milk as almost a cup.”

    Now what about the egg?

    I was not about to find 5/8 of an egg. So I thought:

    The recipe doesn’t say a large egg or a medium egg. And the variations of eggs are huge. So what would it matter if I used one egg or 5/8 of an egg? It’s still pretty close.

    I dumped the whole egg in.

    And I threw caution to the wind.

    At this point, my fractions were so far gone I just tipped the bottle of oil up and let it go.

    And wouldn’t you know — we had some pretty awesome waffles!

    Share your thoughts in the comments or on twitter/x.

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  • Cheesy Math – No, Really. Math & Cheese!

    Cheesy Math – No, Really. Math & Cheese!

    Last night was taco night and my job was to grate the cheese.

    I didn’t get too far in before I noticed some math.

    For some reason I always start grating on a corner. Then I rotate the block so I’m grating on another corner. After doing this a few times I noticed the angles I was creating:

    And what exactly are the shapes, anyway? What is the shape of the grating holes of the grater? And what is the resulting shape of the cheese sliver?

    How much cheese is in the pile after you “fluff” it by grating it? What’s the volume of fluffed cheese compared with stuck-together-in-a-block cheese?

    More importantly, is there enough for two grownups and a toddler? (When one of the grownups loves cheese!)

    What are your math curiosities in the kitchen?

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